I'm hopefully starting an access course in September. I phoned Liverpool University admissions as I would have loved to get a place on their foundation year, but as I did Biology and Chemistry at A-Level in 2006 I can't be considered for that. They have a list of accepted access courses and advised me to apply for the one I have, at Leeds City College, and then apply for Veterinary Science in the usual way.
Bristol University also advised an access course, it has to be biology and chemistry based and there is a minimum amount of credits at Merit and Distinction you need to achieve.
I won't be applying to the RVC but I think they also accept access courses with biology and chemistry, as do Nottingham, but for their 6 year course (with a preliminary year). Surrey's prospectus says "other" qualifications considered on an individual basis, so you could e-mail them.
I've not yet contacted the 2 Scottish uni's, but it doesn't look like they accept access courses.
I think it would have probably been more simple to apply with the standard 3 A-Levels... but it doesn't look impossible! I'd say focus on getting as much varied work experience as you can, especially once your course has finished.
I'm guessing when you say you couldn't work in a laboratory because you disagree with it you mean testing on animals? If so look at other lab work opportunities such as a veterinary diagnostics lab.