Tilly, i believe the prize goes to the first correct entry received/opened. Quite suspicious, don't you think, that one person (from many thousands, one would presume) could win so many times.
Many years ago, i recall there being a bit of a scandal when one Burnley family appeared to be having unnatural luck on the Sun bingo. Turned out one of their relatives worked in the printing department (or whatever) and had handed them 'winning' cards. Of course they were prosecuted.
The fact J Turner wins so many prizes may, or of course, may not mean that some skullduggery is afoot. :-/