For all things military the Service Personnel and Veterans Agency is a really useful Ministry of Defence web site. It contains lots of useful information and they can be contacted about past and present British Military personnel.
They can be contacted using the following:
Free Helpline: 0800 169 2277
Textphone: 0800 169 3458
Telephone: +44 1253 866043 (Overseas)
Telephone lines are open:
8.15am to 5.15pm Monday to Thursday; and
8.15am to 4.30pm Friday.
Service Personnel and Veterans Agency,
All the best,