Supply Staffing in MATs: Why Procurement Oversight Is Becoming Essential

Supply staffing is a vital part of keeping schools running. 

When teachers or support staff are absent, schools need reliable cover quickly. Without it, timetables are disrupted, staff workload increases, and pupils can lose continuity in the classroom. 

But supply staffing is also a major area of spend. For MATs, especially those managing multiple schools, it can become difficult to track consistently. 

From September 2026, single and multi-academy trusts are mandated to procure supply staff through the Government Commercial Agency Supply Teachers and Education Recruitment framework, unless they have an alternative compliant agreement with rates that do not exceed those available through the framework. 

Source: https://get-help-buying-for-schools.education.gov.uk/guidance-supply-staff-mandate 

This makes supply staffing not only a workforce issue, but a procurement and compliance issue too. 

Why supply staffing is difficult to manage 

Supply staffing often needs to happen quickly. 

A member of staff may be off sick. Cover may be needed at short notice. Schools need someone suitable, safe, available, and affordable. 

That urgency can make it harder to maintain consistent processes. 

Different schools within the same trust may use different agencies. Rates may vary. Records may be kept locally. Approval processes may differ. Some agreements may be formal and well documented, while others may rely more heavily on email trails and individual knowledge. 

This creates several risks: 

• Inconsistent pricing 

• Limited visibility of total spend 

• Difficulty comparing agencies 

• Weak audit trails 

• Contract compliance issues 

• Missed opportunities for trust-wide savings 

  
  

For trust leaders, the issue is not whether schools need flexibility. They do. 

The issue is whether that flexibility exists within a clear, controlled, and transparent system. 

The MAT-level opportunity 

For MATs, supply staffing oversight can reveal important patterns. 

One school may be relying heavily on supply because of recruitment challenges. Another may be using a higher-cost agency. Another may have regular short-term cover linked to a recurring operational issue. Another may be using a supplier that performs well but is not visible to the wider trust. 

Without central reporting, these patterns are easy to miss. 

With better oversight, leaders can ask more useful questions: 

Which schools are spending the most on supply? 

Which agencies are being used? 

Are agreed rates being followed? 

Are suppliers compliant? 

Are we using approved frameworks correctly? 

Are there opportunities to consolidate supplier relationships? 

Are recurring absences creating avoidable costs? 

Is supply spend being reviewed alongside wider workforce planning? 

These questions help shift supply staffing from a reactive cost to a managed area of procurement. 

Why supplier management matters 

Supply agencies are suppliers like any other, but their impact is particularly visible because they affect the classroom directly. 

A strong supplier relationship can help schools access good-quality staff quickly. A weak relationship can create disruption, higher costs, and frustration for school leaders. 

That is why supplier performance should be tracked. 

Schools and MATs should be able to review whether agencies are providing suitable candidates, responding quickly, meeting safeguarding expectations, honouring agreed rates, and delivering consistent service across different schools. 

This does not need to be overly complicated. But it does need to be recorded. 

When supplier performance is only discussed informally, it is harder to make evidence-based decisions. When it is tracked consistently, leaders can compare suppliers more fairly and negotiate from a stronger position. 

How better systems support compliance and value 

A centralised procurement and supplier management system can help MATs manage supply staffing more effectively. 

It can provide a place to store supplier details, approved frameworks, rates, contracts, documents, review notes, and approval records. It can also help leaders monitor spend across schools and identify where supplier arrangements need to be reviewed. 

This supports both compliance and value for money. 

It also reduces pressure on individual schools because trust leaders can see what is happening across the organisation and provide support where needed. 

Final thought 

Supply staffing will always require speed and flexibility. 

But that does not mean it should be disconnected from procurement oversight. 

With new expectations around framework use from September 2026, MATs need to ensure that supply staffing decisions are transparent, compliant, and properly recorded. 

For trusts, the goal should be simple: give schools the cover they need, while maintaining clear oversight of cost, quality, and compliance.