You can get certain service records from the Second War released to you if you can get a next of kin form signed and pay the appropriate fee.
Just a word of warning - the fee, which used to be £20 but has gone up I believe, is non-returnable in the event no records are found, and this does happen. I have always thought somewhat unfair. Still what can we expect from the MOD! I still seriously advocate a professional researcher - could save you time and money in the long run.