I was climbing Snowdon that year on a school outward bounds course. We were roped together having climbed the scree at the side of the railway track and were approx 500 meters from the summit, the hard part was done. We had to turn back we couldn't see the person in front of us let alone anyone else
I have no idea what temperature it actually was but I still maintain that is the coldest I've ever been
I've still never been to the top of Snowdon, it's on a list