The Eastern Traverse goes easily and soon we're up on the Great Tower. Behind the others it's a long chilling wait as they cross the bottleneck of Tower Gap, taking the daylight with them. I back-rope the last chap across the Gap and he says "how will the lass at the back get over without a backrope?" and turns the lights off as he turns his back.
Read more at http://www.ukclimbing.com/articles/page.php?id=1726