The reason I was interested was this quote from the BBC site:
Once when we heard someone had been killed, we found out it was twins that had been killed. They were expert athletes and were in their prime and they had won everything within the Regiment, boxing any sport they went in for - they won it. But to know that they had been killed it just wasn't right. BBC - WW2 People's War - D-Day: 72nd Medium Regiment Royal Artillery
Doesn't seem to identify them, however.