For anybody that is remotely interested, I have a 2-page feature in the March 2016 issue of Digital Camera World magazine (on sale from today). Nothing fancy, though you do get a rare glimpse at the interior of the 1962 tube stock Rail Adhesion Train, and I do ramble on a bit about how to take photographs in the low light of the Underground. Sorry about that.
On sale in most places. Try your local WHSmith, or go direct to the distributor at MyFavouriteMagazines.