If you get a bursary, you will receive £5000 a year for your final 3 years at uni. When you graduate, you have to do between 12-24 months of small animal practice, so at Vets For Pets or PDSA. Then, you do a short commission course (8 or 11 weeks, not sure as I have conflicting info) at Sandhurst (you can choose to do the full 44 week one if you want). After completing Sandhurst you get £45000 (taxable). Then you do a 3 week EOC course at Litchfield before becomming a Troop Commander at MWD Regiment.
The commission is 4 years minimum. If you pull out early, you have to pay back your bursary.
My advice, don't do it for the money, make sure it's something you really want to do - you may get to vet school and completely change your mind and want to do farm or exotics!
Any other questions, let me know.