In reply to UKC/UKH Gear:
Official response from Primus UK, to answer some specific queries
1. Main UK stockists of winter gas are; Cotswold Outdoor Ltd, Tiso's, Craigdon Mountain Sports (Edinburgh), Outside, Needle Sport, Cairngorm Mountain Sports, Countryside Ski and Climb
2. Winter Gas uses the best LP Gas available on the market, the cartridge is cleverly designed so that internally it increases the evaporative surface area, producing more gas and therefore more pressure, which is why it works so well in a cold environment both on canister mounted and hose stoves.
Also the use of a stove with a regulator valve, such as the new Primus Microntrail or Primetech will greatly improve performance and fuel efficiency. For more tips on winter cooking see
I trust that helps!