Pardon me if I have missed something that happened a while ago, but looking in detail and current timetables I noticed that all the named trains ( Cornish Riviera, Golden Hind, etc) with the exception of the Night Riviera seem to have vanished. When did this happen?
Which timetables are you looking at? As jamestheredengine has pointed out, there are still names in the footnotes to the electronic National Rail Timetable. Specifically:
Table 125: The Saint David, The Cheltenham Spa Express, Y Cymro/The Welshman, The Red Dragon, The Bristolian, "The Capitals United"*.
Table 126: The Cathedrals Express, Cotswolds and Malvern Express (wot no "The"?)
Table 135: The Night Riviera, The Devon Express, The Torbay Express, The Cornish Riviera, The Mayflower, The Royal Duchy, The Golden Hind, The Armada, The Cornishman
What more do you want? Twenty years ago, there was no Y Cymro/The Welshman, but there was The Pembroke Coast Express. We have now lost The Atlantic Coast Express, The Devon Scot, the Cornish Scot, and The Devonian, gaining the Devon Express and Cotswolds and Malvern Express. Of course some of those are rather cheeky - The Devon Express takes 2h 27m to Exeter St Davids, so is far from the fastest train: the 6:37 takes only 2h 7m!
Or if, you want the names to be more visible, how long is it since any of the named trains was named anywhere other than in footnotes in the National Rail Timetable (any medium)?
*Sic. Since all these names have capitals, shouldn't this be "The Quotation Marks United"?