I've finished checking the birth indexes up to June Quarter 1943 which by my calculations is the latest a child of the late Sgt Robinson could have been born and have found one another possible candidate:
Births, **** Quarter 1942
ROBINSON, *********
Mother's maiden name: HALES
Ref: *********
Have PM'ed the full details to Sarah.
Al
I think both the births you quote are certain to be his children. How many Robinson-Hales marriages were there at the right time to be producing children then?
I've done quite a bit of this sort of analysis in my own family tree with a lot of success, so unless you're dealing with two common names (and I wouldn't count Hales as particularly common), it's a safe bet.
Of course, it's unfortunate that the children's names are the more common Robinson, but it should still be possible (though costly) to look for relevant marriages some 20-28 years later. I located a living relative who was born Pauline Butler (probably as common as Patricia Robinson) using such an approach. I searched for and listed all possible Pauline Butler marriages, eliminated some based on location, and ranked the remainder in order of my perception of likelihood. Then used the electoral roll and BT.com to locate the phone number of the top candidate, which proved to be the right one (though her husband initially denied it when I called, admitting later that he feared I was a scammer!).
Cheers
Tim