The solution to this crossword has been published today. I don't normally bother to check but I have after this discussion.
I've just noticed that on the Times Crossword Club site, it highlights which answers you got wrong.
I had
1a All Fools Day
37a Berk
3d Laid
All highlighted as wrong, all printed as the correct answers today!
I can see some confusion with the setter/editor deciding at some stage whether the correct solutions were Berk/Jerk and Laid/Lain but I can't see why 1a should have caused any confusion.
Weird.