Hi,
Your relatives doc`s are held in glasgow,below is the address and tele number,
THE ARMY  PERSONNEL  CENTRE
 CIVIL SECRETARIAT
  HISTORICAL DISCLOSURES, MP 400
   KENTIGERN HOUSE, 65 BROWN STREET
    GLASGOW G2 8EX.
 Telephone 0141 2243512
You have to ring up, ask for an application pack, but i`m afraid theres a 6-7 months backlog for ex servicemens record searches. 
Cheers. Ian  
