Dead common me.
I have breakfast, elevenses, dinner (that's common), tea ( that's common too.
Lunch is a light midday meal, which i call dinner. We often had a large cooked meal at dinner time.
I think people who put me right about eating lunch are just pretentious.
Dinner is a cooked meal early in the evening. Usually 8.00 at the latest. Only I call it tea, and it could be beans on toast.
Tea is something that people have in the afternoon, often accompanied by a biscuit.
Common old me loves afternoon tea with a selection of cakes and sandwiches, accompanied by prosecco or champagne.
After consuming afternoon tea, I would skip the meal designated as tea or dinner.
Supper, for me, would be a piece of toast or crumpet, together with either tea, drinking chocolate or cocoa. This would be consumed just before bed. Sometimes with marmite on the toast.
I suppose supper could also be an evening meal/dinner/tea taken later in the evening, after 8.00 o'clock.