You can access PhD Theses from other UK Academic Institutions using EThOS (Electronic Theses Online Service) from the British Library. 

You can browse the index freely, but if you want to view the text of a thesis, you should register for an account (which is free) by clicking the Login/Register link on the EThos homepage.  There are currently 160,000 full-text theses available in EThOS, or with links to the fll-text in EThOS, many of those not available as full-text are available to be ordered for scanning throgh the EThOS digitisation on demand service.  To limit your search to full-text only theses, tick the box next to "Limit search to items available for immediate download".

If you find the record for a theses which isn't available full-text, you can make an Inter-Library Loan request, this takes at least 30 days to complete, so it's best to check in advance if you need something which isn't currently available full-text in EThOS.

EThOS doesn't currently contain all UK PhD Theses, so if you are aware of a thesis you'd like to read and you can't find it on EThOS then get in touch with our Inter-Library Loans service who will try to track it down for you.