Good find Cambrian!
I have found similar details on Familysearch, but a different reference, so i thought I would put it on 
here anyway :-
   
William H Hughes
mentioned in the record of Byatt and William H Hughes
Name   William H Hughes
Event Type   Marriage Registration
Registration Quarter   Oct-Nov-Dec
Registration Year   1922
Registration District   Conway
County   Caernarvonshire
Event Place   Conway, Caernarvonshire, Wales
Spouse Name (available after 1911)   Byatt
Volume   11B
Page   915
Line Number   91
 
William H Hughes probably married one of the following people
 Ellen E  Byatt