When planning your route, you need to have plans in place for multiple eventualities because things can catch you out quicker in winter. Bad weather, navigational error, low visibility, poor concentration, forgotten kit; the list of potential problems is long, but none have to be a disaster if a plan is in place.
Top Tip: Everybody loves a well-executed plan B, but when out on the hills in winter, you need a plan C and maybe even D with alternative exit routes and new objectives. It’s also essential that everybody knows of these plans. That way, if something happens, everybody knows what's going on.