My seed potatoes are in seed tray sized gravel trays on the bed in the spare bedroom, 40 to a tray, about 6 or 7 feet away from the window.
The radiator is set on frost guard only, and the curtains/blind have been left open so that they get optimum light. The window in this room faces west. They all seem to be chitting away quite nicely. All that remains is to prepare somewhere to plant them.
We only took over our allotment in October, and unfortunately within a week or so I damaged my knee, so have been unable to do much. Besides which it's been pretty wet for the last month or so.
The onion sets and shallots have just arrived, and they will be put in the same place, out of their net bags and in gravel trays also.