Adobe Education... Start here https://creative.adobe.com/join/edu
Education Plan https://creative.adobe.com/plans?plan=edu
When you buy an Education subscription, the terms should be clear
-One Year Intro Price http://forums.adobe.com/thread/1448933?tstart=0
Redemption Code https://creative.adobe.com/educard
You are from Great Britain, it will be best contact support & get the confirmation regarding your institution.