Just remember that if you are thinking 'I can do a year of that and transfer to Vet' that that isnt possible at any Uni - you would have to start the Vet course in year 1, and your A levels will still be taken into account. Equally graduate entry (after a Biovet degree) is difficult (again they will look at your A levels and if you arent in line for a First, forget it) AND you wont get funding for a 2nd degree.
If you go for Biovet make sure you do actually WANT to do the course - and aren't still hankering after being a Vet.