I wonder if that is the one from 1911, with Allez being transcribed as Alley very easy to do as a z and y were written in much the same way? If so, he probaby has nothing to do with this family apart from the coincidences with initials.
If so, we are still no nearer finding out why either John Ansell changed his name from Albert Alley or vice versa!
Just noticed:
Albert JAMES V Allez died June quarter 1982 Portsmouth
Albert JOHN V Alley died June quarter 1982 Worthing
John Ansell died June quarter 1982 Worthing
So I think we can ignore the Allez, it is just a big coincidence. It also explains why John called himself John!