Well well - yours flat from the wind and Hywel's flattened by his cat - its just bad luck time for onions! I'd leave them be for a bit and see if they stand up again.Or you could stake them...

If a few onions are laying down flat, you can simply set them straight. Don't let them lay on the ground - the bugs will get them.

Thanks guys, I have a lot of short canes and will start the job tonight.