Surely you mean afternoon tea. High tea was more like a supper -- a substantial evening meal usually involving meat, generally (forgive my saying it) applied to the evening meal of the lower orders. It's a common misnomer to call "afternoon tea" "high tea."
I think that the context makes that clear. Personally, I prefer high tea, with pasties and real, substantial food, to finger snadwiches and biscuits. But then again, maybe I am, in the words of ernest, "country."