As I said, the official advice is that you don't HAVE to, however, they may offer you Rabies, Typhoid and Hep B as an option. As they no longer boost Tetanus as routine, you would have to have a booster before coming.
That said, the UK has a vey hands off approach to immunisation at the moment as most diseases are sufficiently covered by herd immunity (where because the majority have been vaccinated the people who haven't are covered to a large extent) and cases are low.
Personally as long as there is a low risk, I would have all the vaccinations I could, why not?