A lot of "The Trip" is improvised, with them congratulating themselves all over the north of England as they supposedly are dining in famous restaurants in order to write about the food. In fact, as Len pointed out, it's too chaotic to be fiction. Mocumentary is the best description I've seen for the genre.
The claim that the two egomaniacs are exploring something about fine restaurants is a sham. There's no way they could ever write about what they were eating because all the time they are tasting the food, they are competing to do impressions of truly famous film stars and also competing to quote famous poetry about the places they are traveling. They sit in front of painstakingly plated little morsels of fish, duck, pigeon, chocolate cake, or whatever that's just come out of the kitchen of whichever restaurant they are in.
There are lots of shots of the kitchen staff painstakingly sauteing and arranging the food which the two characters shovel into their mouths without seeming to notice it. Although they are supposedly in 5 different restaurants I suspect that all the shots were taken in only one kitchen. Repetitiveness is another annoying feature of "The Trip."
Fortunately the evening started better. We ate at Seva, which has been Ann Arbor's principal vegetarian restaurant for nearly 30 years. I think it's improved since I was last there -- a marvel for a local restaurant. Our 4 dinners were nicely plated but not to the extremes of the awful film: