If you're counting HSTs then everything on the east coast, plus great Eastern main line, the sleepers, East Midlands HSTs, Chilterns trains, 4 xc sets, the new transpennine sets that are being built, a few Cumbrian coast services, and within a few weeks the great western pocket rocket HSTs and the scotrail ones. Less popular than they used to be, but very rare is overstating it a bit