"Carol Hague" wrote ...
My cauliflowers got badly eaten earlier this year, by some sort of
caterpillar, I think.

But one of them remained undaunted and has produced this fine specimen
:-

http://pics.livejournal.com/cat63/pic/0000zre4


That looks like Pigeon damage to me.
You need to invest in some bird netting. :-(

--
Regards
Bob Hobden
17mls W. of London.UK