I'll be putting a detailed post on this forum come the spring on exactly what I did and the results. I have actually 3 lots of trials going on.
1/ Six are in a garage on a ledge against the window, cut back in pots surrounded by white polystyrene to throw back the light.
2/ Same as above, expect in an unheated GH, dusted with yellow sulphur to prevent botrytis (grey mould). Important to keep GH door open at all times and dry inside. The base of the pots are surrounded with old towels and an old jumper placed over them at night when frost is forecast.
3/ Six have been completely removed from the pots, dried, loose soil shaken off, dusted with yellow sulphur, wrapped in newspaper and stored like tubers.
Like KEF, I lost the lot last winter to grey mould, if any of these methods work for me in Aberdeenshire, I hope they will work anywhere.
My neighbour is trying the same dry method too.