Does the cold make you dream about upgrading your sash windows? Here are the two basic ways to put an end to the nightmare of heat loss and draught:

To cut the case, it costs 450 - 1400 GBP a window. Wether you get a chippie to reglaze / draught proof the existing ones, put up secondary internal glazing or go for the full monty with high performance triple-glazed, draught-stripped sashs (details).
The Swiss Alternative
Swiss Cherry turned a little known thermal secret into a novel thermal insulator. Filled with hundreds of cherry stones that mould themselves into their surroundings, we created a nifty, efficient thermal barrier.
The Smarter Way
Well, we might be a bit biast here, but we think it pays to do it like the Swiss this time. So go on then - save your time, energy and that dent in your pocket on http://goo.gl/IsceL and start finally feeling at home in your castle.