Trooper Allan Trevor Wrench

There are two AT Wrench's listed on the Australian Government's Department of Veterans' Affairs WW2 Nominal Roll. Both were born in Parramatta NSW on 08.05.1921, with Next of Kin listed as Percival and Percy.
Alan Trevor Wrench's (service number N6757) service records are not open for inspection on the National Archives of Australia database. On the WW2 Nominal Roll, his date of enlistment is 22.05.1940 and he was discharged on 25.11.1941.
Allan Trevor Wrench's (service number NX87922) service records are open for inspection on the National Archives of Australia. His locality on enlistment is listed as Kenthurst NSW, as is his address and where his next of kin lived. He enlisted 09.02.1942 and was discharged 08.05.1944. It is possible Alan and Allan are the same person. Neither saw service outside of Australia.