Access to the Geant IaaS framework, which was procured under EU rules, has been made available by Jisc. Azure purchasers have a choice of 3 suppliers - Comparex, Atea and SoftwareOne

More details about the service here:

https://www.jisc.ac.uk/geant-iaas-framework

You can elect to purchase from any one supplier or, if you have complex requirements, you may run a mini-competition to find your own preferred supplier.