What does British people's weekly diet (the composition (detailed if possible) of breakfasts, lunches, dinners, snacks if there are any) usually consist of and how much do they spend on that?

McDonald's, Pizza, I guess you should say, what age group? What social economic group?
At home or eating out?

Smoked salmon scrambled egg, Crystal champagne.
Beluga caver, wagyu fillet steak with Latour 1945
Chateau Yquem 37 and ice cream...

Don’t forget the spotted d1ck. It’s actually a British pudding.

Nutella.