It doesn't help that it doesn't look different to standard class. To be honest, the first class provision on the 387s is disgraceful.
Agreed, but perfect for GTR who did such a terrible, even negligent, job of refreshing first class on the other GN trains, such that people wouldn't be able to tell they were in first class there either.
Okay, the seats ARE better on a 365 and 321 so you can argue it must be obvious. There are proper tables on the 365s (now folding on the latest refreshed ones, so you can get in and out easier) but there are often no first class stickers on the walls and windows, relying solely on antimacassars on all the stock which can be removed deliberately, accidentally or just obscured by heads.
The 365s have a warning you're entering first class by writing FIRST CLASS on each door, yet on many services they're locked open. So you have to rely on poster signs, which I DO NOT regard as sufficient warning.
Make first class blatantly obvious as most TOCs do, then enforce things fairly. You'd almost think GTR wants to trick people into going there to make money...
I got tired of sending photos of first class accommodation that I saw as poorly signed to GTR, as nothing was ever done.
The 387s are mad because you go through a sliding door that says nothing so wouldn't necessarily even think you might be in first class at all. A bit like walking through a 377/5 where you are in a declassified first class section and go through the doors to the next unit where it IS first class. Going through the gangway, you'll encounter no signs at all.
(Sorry for the long rant, but it does annoy me. And I say that as someone who has NO problem with people who DO know they shouldn't be in first class being prosecuted).