Hi Eliza!
We were at the teaparty 10 days ago.
We'd gone for the 3.30 option so we could fit in tea later if we wanted to.
My DD and I didn't eat later, we just had a small snack from the food we'd taken with us. My friend had to take her son to McD's in the evening as he is a pickier eater and had eaten less at the tea-party.
There was both sweet and savoury to choose from although not a huge variety of savoury. It seemed like breakfasty options for savoury as there were sausages, potato shaped into triangles, mini omelettes, and what I thought was going to be pasties but they where actually sausage and ketchup inside. I can't remember if there were any other savouries.
The food was reasonable for the price when you go knowing the chatacter interaction is what you're really there for.