just to clarify antheia...you are eligible to work in the UK under what is called an ancestry visa which means any one from a commonwealth country who has a grandparent born in the UK can apply for a working visa for five years provided they can prove they intend to work and will be fully self supporting. you would unable to claim any government financial assistance like a citizen can and cannot carry a british passport.

you father however could apply for permanent residency and a passport.