Take the dead flowers off, then allow the stems to die naturally. This is to feed the bulbs for next year. If they're in pots, put them in a sheltered corner and re-pot the bulbs in fresh compost in the spring. Don't forget to label the pots! If they're in the ground they can stay there.

Transplant them into a bigger pot, but disturb the roots as little as possible, and don't plant it deeper than it was. Water as needed, and keep it in at least morning sun. Feed it lightly and frequently with tomato food until the foliage turns yellow and brown, then cut the stems at ground level. New sprouts should appear next spring, with flowers in the summer. It may be able to take full sun the second summer, because it won't be right out of a greenhouse. They can also be planted in the garden, but Spritzhenry tells me that that makes lily beetles harder to deal with.

Too true it does, Tug. :-(

Well - that's two methods to choose from, guest!

I come from a milder climate, so if frost heaving is a problem, maybe repotting now isn't so great.

It could well be, depending on where in the UK you live. I just tuck my pots near the greenhouse, but out in the open in a cold area, they might suffer and not survive.