I worked at a Toby Carvery when I was a student, back in ye olden days. A few things I remember :
1, Joints of meat which were unfinished at the end of the evening’s service were put back in the oven for use at lunchtime the next day. These weren’t normal ovens, they were called ‘cook & hold’ which maintained the cooked meat for hours at a constant 75C in a very humid environment. Very clever.
2, All the veggies & Yorkshire puds were fresh & cooked daily by the chefs. That’s a lot of spuds to rumble, carrots to peel, cabbages to shred etc etc. They weren’t really chefs at all, just hard-working, efficient prep monkeys.
2, Soup was made from the previous day’s leftover veggies & gravy, blitzed together with added Maggi soup seasoning mix.
3, All the desserts were bought in, none were home made. They were plated up by the waiting staff, not the chefs.
4, Most of the non-carvery mains (other than steaks, obv) were also bought in. Eg coq au vin was a boil in the bag product.
5, Hygiene standards were good. I was happy to eat the food. A hot roast beef roll with a yorkie & a couple of roasties was my favourite treat at the end of my shift.