Usual method is to lay them on their sides on top of some dry material like sand or potting compost (dry) in a tray or something for a while, then pull off the dead growth and I usually 'pot' mine in dry sand or dry sand and dry compost mix and store somewhere frost free till early March, when you pot up and start into growth in a greenhouse or indoors.

Thanks Bamboo. Does it not matter then if I have pulled them up before a frost?

No, not at all. Just depends on you whether you want to wait for a frost before giving up on more flowers.

Oh Yeah,do carefully clean off as much compost as possible before laying them out.

dont worry most questions are reasked time and time again but i feal its a nice way of breaking the ice and generaly social and friendly almost family feal of this great site . when i had a atburnard id love a pound for every persen who asked about brandy or said hes a big one . you still smile and ask about the weather lol x .

Many thanks for all your comments. Am I ok to use the old compost from my grow bags that have had tomatoes in to pot them up in.

Provided its quite dry and you didn't have any problem with blight or mildew with the toms, it should be okay.