An excuse to avoid my school swine flu vaccinations (UK!)

Hi, i am 15 and i am interested in finding a solid excuse to not having my vaccinations. My parents prefer ne to have it and see things like ATS and things like a group for paranoia and 'conspiracy'.
Anyway, i am not well informed with the UK laws but i was hoping if it was against my religion, i can refuse it, right? I am a sikh and it is said by the ten gurus that ALL types of intoxication is not allowed. I notice that christianity and islam is the main issue on the religious boards on ATS so i am not expecting huge feedback. I am also hoping for better excuses than this so i can ignore the possibility of being thrown out of school for not being vaccinated/poisoned.
I appreciate all helpful replies!

p.s. Im agnostic

But because i am a minor, i have no say in the law...?