I only ask as I am 51st, enlisted Jan 64 (The last entry) and felt a bit left out of it
My number; W1950385.
My brother was 43rd Instruments General, St Athan.
His number; U1944274.
I know that 1950574 was 51st Telegraphist at Cosford.
1950004 was 50th, also Telegraphist at Cosford.
Pre WWII BE numbers started at 550000 in 1934 and finished with 5540027 (Not sure about the year but I imagine about 1941)
Post WWII BE numbers started at 1920000 in May 1947 and finished with 1950602 in 1964.
Aaron.