For purchasing over £25,000 you will need to undertake due diligence in a tendering process. In that case, think about setting out and prioritising your requirements (see the specifications section).
The financial regulations require the use of the University’s SAAS Terms & Conditions. If that isn’t possible, you may need further assistance from Purchasing and/or Legal Services.
There are two elements you will need along with the T&Cs - a Security Schedule (see Security) and, if relevant, a Data Processor Agreement (see Data Privacy).