cbhasin:
As Andy just said, Service records are the most useful things you can get. I will vouch for that having asked my mother about 2 years ago to apply for my father's. It was free for her to do so as Andy said, and the only cost for me was to obtain a copy of Dad's death certificate which is also required by the MoD for Service records to be issued.
It was a very very worthwhile thing to do, so I can only encourage you to apply for them.
RRTB