Loco hauled are very rare - HSTs from the 70s mainly being replaced on GWR mainline, a little use on WCML and cross country 2 or 3 sets?) and I think the east coast does them too. And Eurostar of course.
Aside from those it's freight and the sleepers isn't it?
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
Aside from those it's freight and the sleepers isn't it?