As Cajary said - lift the plants before the frosts, pot them up and put them somewhere light, frost free, and cool - Cornwall for instance
- (an unheated bedroom window sill?) And only water when the compost is dry.
For cuttings - now is a fairly good time, take finger lengths of stem, preferably a non-flowering shoot, cut just above a leaf joint when collecting the cuttings. To prepare the cuttings cut just below a leaf joint, trim off all bar 3-4 of the small top leaves and push into a pot of compost/vermiculite mix. There is no need for hormone rooting powder and you shouldn't need to cover the cuttings. Water carefully so that the compost mix is just damp - never soggy - and wait.
You should be able to put around 5 cuttings in a 3" pot.