If you have slug rings then most definitely put them around the cauliflowers. I grow slugs by the bushel and most of them would just love to take up residence in the cauliflower curds. Also cauliflowers especially need to be kept well watered, a point to bear in mind if you get a lengthy dry spell.
The other thing you might want to do is put brassica collars on them all (cabbage & cauli), or you just might lose the lot to cabbage root fly.
I know I was always pestered with that when I lived in Kent.
Other than that, some good luck and a daily inspection to pick off the caterpillars.
