Not people literally eating, the laughing, the banter, the smiles, the toasts, some of the best pics from my wedding were of people laughing during the meal. Maybe it's a UK thing buit I've never heard of photographers joining in with the meal? Isn't it like the vicar taking a break mid service for a sandwich?
Over here there tends to be three courses, often with speeches, toasts, etc around that time. Part of that is the main course, which is usually at least an hour. Once the guests have all been through the buffet or all been served most of them are just sitting there eating, that's when I eat.
The vicar isn't on their feet constantly moving for 10 hours, a better analogy would be to intermission at a cinema.