Condition category
Not Applicable
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
The Social Workers in Schools (SWIS) trial will study an intervention which puts social workers into secondary schools across 21 English Local Authorities. Following on from three previous studies which showed evidence of promise, the trial will evaluate the programme on a larger scale to establish the impact it has on some important social care and educational outcomes. The study team will also learn more about how the intervention works and how it varies.

Education and Children’s Social Care (CSC) have an important inter-agency relationship, and both play a vital role in keeping children safe and promoting their wellbeing. Policymakers have been increasingly interested in finding ways to improve how education and CSC work together to respond to safeguarding concerns and protect children, and in the context of the COVID-19 pandemic, these efforts are likely to intensify.

SWIS is a promising approach to doing this. The central idea is that having a social worker linked to and based within a secondary school can have a range of benefits. In particular, to improve the service delivered to children and families, enhance interagency working, reduce risks to children and lead to better outcomes.

Who can participate?
The programme initially planned to fund the evaluation in ten local authorities, but following high levels of interest, the project has been expanded to cover 297 schools across 21 local authorities: Croydon Council, Cumbria County Council, Devon County Council, Ealing Council, Gateshead Council, Haringey Council, Harrow Council, (Kingston upon) Hull City Council, Lambeth Council, Merton Council, Newcastle City Council, Salford City Council, Somerset County Council, Southwark Council, Staffordshire County Council, Sutton Council, Swindon Borough Council, Tameside Metropolitan Borough Council, Tower Hamlets Council, Wirral Council and the City of Wolverhampton Council.

What does the study involve?
Social workers will work within schools across 21 Local Authorities (LAs) in England, and the study will evaluate the impact of the programme by comparing outcomes between schools that have a social worker and those that continue as normal, without a social worker based on the premises. Schools will be selected randomly from a pool of schools put forward by LAs to receive a social worker so that we can be confident any differences we observe are due to the intervention and not another difference between the groups.

The primary outcome tested will be Child Protection (Section 47) enquiries, but other social care and educational outcomes will also be analysed to see what impact the intervention has on these. The study will also calculate the costs of SWIS and will explore how and why the intervention works as it does.

What are the possible benefits and risks of participating?
The risks of participation are minimal. Data will be anonymised and at school level, so there is no risk to individuals within schools. Data collection will involve interviews with social workers and their managers, school staff, and children. It may also involve participant observation– where researchers shadow social workers to understand more about their day to day activities– if restrictions associated with COVID-19 allow. During these activities, risks are thought to be low, as the primary focus will be the intervention and not any difficulties children and families are experiencing. However, in line with standard research ethics protocols, steps will be taken to ensure that participants are not harmed by taking part and the chance of experiencing distress is minimised. Participants will be involved using informed consent, and can withdraw at any time and draw on support following the data collection if they need to.

Where is the study run from?
The Centre for Trials Research (CTR) at Cardiff University and the Children’s Social Care Research and Development Centre (CASCADE) at Cardiff University (UK)

When is the study starting and how long is it expected to run for?
From August 2020 to July 2022

Who is funding the study?
The Department for Education via What Works for Children’s Social Care (UK)

Who is the main contact?
1. General enquires,
2. Mr David Westlake (PI),

Trial website

Contact information



Primary contact

Mr David Westlake


Contact details

Cardiff University
1-3 Museum Place
CF10 3BD
United Kingdom
+44 29208 70246



Additional contact

Dr James White


Contact details

Centre for Trials Research (CTR)
Cardiff University
7th Floor
Neuadd Meirionnydd
Heath Park
CF14 4YS
United Kingdom
+44 (0)29 2068 7054



Additional contact

Ms Linda McConnon


Contact details

Centre for Trials Research (CTR)
Cardiff University
7th Floor
Neuadd Meirionnydd
Heath Park
CF14 4YS
United Kingdom
None available



Additional contact

Dr Fiona Lugg-Widger


Contact details

Centre for Trials Research (CTR)
Cardiff University
7th Floor
Neuadd Meirionnydd
Heath Park
CF14 4YS
United Kingdom
+44 29206 87519

Additional identifiers

EudraCT number

Nil known number

Nil known

Protocol/serial number

Nil known

Study information

Scientific title

The SWIS Trial: A randomised controlled trial of school-based social work



Study hypothesis

Is SWIS more effective than usual practice in:
1. Reducing rates of Section 47 enquiries (at 9 months following the start of the school year)?
2. Reducing rates of referral to CSC and Section 17 assessments (at 9 months following the start of the school year)?
3. Reducing the number of days children spend in care (at 9 months and 21 months following the start of the school year)?
4. Improving educational attendance, (at 8 and 10 months following the start of the school year) and attainment (at 9 months following the start of the school year)?

Ethics approval

Approved 26/08/2020, School of Social Sciences Research Ethics Committee, Cardiff University (Glamorgan Building, King Edward VII Avenue, Cardiff CF10 3WT; +44 (0)29 2087 5179; no email address available), ref: SREC/3865

Study design

Cluster randomized controlled trial

Primary study design


Secondary study design

Cluster randomised trial

Trial setting


Trial type


Patient information sheet

Not available in web format - please contact to request a participant information sheet.


Children's Social Care - aiming to reduce rates of Section 47 enquiries, referrals to children's social care, Section 17 assessments, and the number of days children spend in care.


The objective is to evaluate the effectiveness and cost-effectiveness of an intervention called Social Workers in Schools (SWIS). SWIS involves embedding social workers into schools so that they can work more effectively with education colleagues and with children and families. Having a social worker linked to and based within a secondary school is thought to have a range of benefits including enhanced school response to safeguarding issues, increased collaboration between social worker and school staff, and parents, and improved relationships between the social worker and young people, thus reducing the risks to children, leading to better outcomes.

Previous research has identified three pathways through which SWIS may work. Pathway A is based around regular communication between the social worker and school staff and requires the social worker’s expertise and contribution to be welcomed by the school. The advice and support given to school staff is thought to increase their confidence in safeguarding issues and improves the quality of school referrals. Pathway B is about working directly with families and improving relationships between social workers and parents. Pathway C is more about working with children and young people directly. Frequent interactions with the social worker are thought to enable the young person to trust the social worker and to feel understood and supported. This is theorized to lead to improved school attendance and participation, better management of a young person’s risks, and improved outcomes. In all three pathways, improved child and family outcomes are theorized to lead to a reduction in the number of children in care.

According to the intervention manual shared with delivery sites, key features of the SWIS programme, delivered over 9 months include:
1. Social workers embedded within secondary schools (but can also work with feeder primaries). They should have their own office space in the school and opportunities to integrate.
2. Experienced social workers (being in practice for at least 2 years).
3. A focus on statutory social work with additional opportunities for “preventative” aspects, which could involve “advising staff, families and young people” and working with children who are not at the threshold for formal involvement.
4. Caseloads managed within the team and in line with local authority averages, and where possible the carry-over of existing caseloads prior to the launch should be minimal. To avoid disrupting existing relationships, SWIS workers are expected to take on new cases (as opposed to taking on cases handed over by other social workers).
5. Face to face contact should be the basis for the intervention in order to build strong relationships with school staff, children, and families.

21 local authorities and up to 291 schools across England (approx. 290,000 students) will take part in the study. Clusters (schools) will be randomised to receive either the social workers in schools program or continue with usual practice. Schools will be stratified by local authority and we will use a balancing algorithm for important baseline covariates. The effectiveness and cost-effectiveness of social workers in schools will be assessed and reported 9 months after the start of the school year (with educational attainment reported at 21 months and days in care assessed and reported at 21 months in addition to at 9 months).

The researchers will be looking to see if there are reduced rates of Section 47 enquiries (at 9 months following the start of the school year). Child protection (Section 47) enquiries are investigations CSC carry out when they have “reasonable cause to suspect that a child who lives, or is found, in their area is suffering, or is likely to suffer, significant harm” (Children Act, 1989). This is a key point in the work of CSC; an enquiry would normally involve an assessment of the child’s needs and the ability of family members of carers to meet them. Social workers would normally interview family members, children (if they are old enough), and use information from other agencies such as schools and health. A reduction in this measure could be taken to indicate that risks to children were reduced, as fewer children would be reaching this threshold of perceived risk.

The study will also explore if SWIS is more effective than usual practice in reducing rates of referral to Children’s Social Care and Section 17 assessments (at 9 months), reducing the number of days children spend in care (at 9 months and 21 months), improving educational attendance (at 8 and 10 months) and attainment (at 9 months and reported at 21 months) and whether these changes are greater within schools that received the intervention compared to schools that did not.

Case study interviews with social workers, students, and school staff will also be conducted to explore what happened during the setup and use of the SWIS programme, how people feel about the intervention, and in what ways it has been useful.
Finally, the cost of the intervention will be calculated to see if it provides good value for money.

Intervention type



Drug names

Primary outcome measure

1. Number of child protection (Section 47) enquiries calculated from data collected from Local Authority (LA) CSC departments, based on a data-sharing agreement between each LA and the research team at 9 months

Secondary outcome measures

1. Number of referrals to Children’s Social Care measured from anonymised data collected from local authority departments at 9 months
2. Number of child in need (Section 17) assessments measured from anonymised data collected from local authority departments at 9 months
3. Number of days in care measured from anonymised data will be collected from local authority departments at 9 months and 21 months
4. Educational attendance as a percentage of total term days measured using anonymised administrative data collected from the National Pupil Database (NPD) at 8 and 10 months
5. Educational attainment at key stage 4 measured using anonymised administrative data collected from the National Pupil Database (NPD) at 9 months

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Students, school staff, and social workers in England

Participant type


Age group




Target number of participants

Up to 291 schools across 21 local authorities across England

Participant exclusion criteria

1. Fee-paying schools
2. Schools with <133 students
3. Schools likely to be closed or merged during the trial
4. Previously received the SWIS intervention in the pilot

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Centre for Trials Research
Cardiff University 4th Floor Neuadd Meirionnydd Heath Park
CF14 4YS
United Kingdom

Trial participating centre

Children’s Social Care Research and Development Centre (CASCADE)
School of Social Sciences Cardiff University 1-3 Museum Place
CF10 3BD
United Kingdom

Sponsor information


What Works for Children's Social Care

Sponsor details

Albany House
Petty France
United Kingdom
+44 (0)7773 647480

Sponsor type




Funder type


Funder name

Department for Education, UK Government

Alternative name(s)


Funding Body Type

government organisation

Funding Body Subtype

National government


United Kingdom

Results and Publications

Publication and dissemination plan

The study protocol that follows the SPIRIT guidelines for trials of interventions will be published at and the Open Science Framework (

The main study results and process evaluation findings will be published in high impact journals and a report to the funder at the end of the trial (approximately July 2022). An interim report on outcomes will be submitted to the funder at 9 months (July 2021).

Case study findings will be presented to the education, health, and social care community at public events and to the academic community at scientific conferences. If effective, avenues for delivering the intervention to other schools across the UK will be explored.

IPD sharing statement:
The datasets generated during and/or analysed during the current study are/will be available upon request from at the end of the trial (August 2022) and will be considered by Cardiff University and the funder. Aggregated trial and HE data, anonymised qualitative data and National Pupil Database (NPD) data will be archived in the ONS Secure Research Service (SRS) by the funder. Data can be accessed by Approved Researchers remotely accessing data as per ONS processes. This will be following an application to the NPD (if those data are required) as well as an application to ONS for access to the SRS. Consent for this data to be held in the SRS will be sought for the qualitative data, all other data are anonymous/aggregated.

Intention to publish date


Participant level data

Available on request

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

30/11/2020: A scientific contact has been added. 25/11/2020: Trial’s existence confirmed by Cardiff University.