Just picked up some 'Berghaus Scape II Pant Mens' instore at Field&Trek (MK) for £40. Looks like same price on their website. Seem ideal for winter sports and include the Recco Avalanche Rescue system.
They were selling these for £60 a few months back and it looks like all others are selling them for between £60 - £120.
Edit: Looks like Black sold out but choose Coco Brown and you can buy online. I got the Coco Brown ones instore, great colour in my opinion.