Don't know how meaningful this is, but from
http://www.gla.ac.uk/undergraduate/degrees/entryrequirements/vet/
"Faculty of Veterinary Medicine Entry requirements
Veterinary Medicine (BVMS) Admissions for the BVMS programme should be submitted to UCAS by 15 October.
The Faculty is unable to offer applicants deferred entry."
Sounds like a no, but sometimes if you ask there are exceptions. You really would need to call.