Thank you for all the replies. Fred was my batchelor uncle, it was while I was searching the Nat.Arch Durham Home Guard Records that I found my father, Kenneth Watts listed in the Durham 13th Battn.( a new discovery for me!)He enrolled on the 15/2/1943 and was discharged on the 16/3/1944 The record states Fred as next of kin living Pennyfine Lane, Sunnyside. In 1939 Fred was in Westminster working as a cellar man, this is a mystery unless he was in London for some other reason. Kenneth was a patternmaker and in a reserved occupation, he was bombed out of his 'digs' and having nowhere to live walked into the first recruiting office and joined the RAF on the 16/3/1944, (RAF service paybook) he was posted to Burma and by 1945 Fred was living in Derwent Terrace, Front Street, Dipton according to letters written by my father from Burma/India.
The replies are very interesting, does anyone know anything about 'Y service'. I have searched the Bletchley Park records without success.
Again thank you for the help, Carolmc