As the picture shows, the first class seats on Great Western, that runs the long service from London down to Plymouth are large, comfy and in good condition. The broader service is hit and miss.
I do not use the route a lot, maybe 3 times a year to and from Exeter, every trip has seen apologies for completely nonexistent buffet service to only limited for a few stops out of London. How can this be? The trip from London to Plymouth is about 5 hours and having no drinks, food as a norm seems just sloppy and incredibly incompetent. Not to mention lost revenue.
On our trip today we also had doors that did and then did not and then did work. Air con that played up in some carriages. No water at all in the toilets (and of course no drinks or food)
Pity as train is better overall and faster than cars.
I did not even get into the complex and bizarre pricing of train tickets…