Very wise of you, pasta.
I was in a workplace syndicate for some years but I never saw my share of the winnings because I'd have been the odd one out, wanting actual cash, rather than "extra lines", which never failed to fail to win us extra prizes. The organiser was very diligent and furnished us with a photocopy each of all the lines, extras included. (Back in the days of tuppence per A4 sheet, 20+ players, workplace photocopier paper, tee hee).
However, this is now so long ago that I can no longer remember my numbers, let alone the other members' ones, so I can't even find out if they had a win after I left that job.
The most I could do is pick a fresh set of numbers and see what this website says.