It's terrible.
A young friend of mine had a holiday job in a fairly posh restaurant. The basic table d'hote was 50 GBP, and they even charge tap water at the same price as the San Pellegrino. The friend was under 21, so was paid low nmw; zero hours contract. (My son, btw, who is a qualified sommelier with experience in Michelin starred restaurants, didn't even get an interview for the same job, presumably because he was over 21 and they would have had to pay him the full whack.) Tips were put into a pot, but she wasn't too bothered as all the tips were great - several times in her first week, she pulled over 100 GBP in tips, as did her colleagues. She still calculated that her share would be several hundred pounds and would practically double her wages. BUT, at the end of the month, she got less than 30 GBP in tips paid back, as the boss did a share-out based on seniority; meaning that the restaurant managers got the most tips.
The same restaurant also has a reputation of being "sold out" of their house wine (the only wine they sell by the glass) so that people are forced to buy much more expensive wine by the bottle.