Just to give a sense of some of the food options for tea at the V and A museum, here are some photos (albeit from 2017):
Note that these scones are not pre-sliced — pull them apart along the natural crack that developed as they rose while cooking.
You could put together a really nice tea for about £15-20 with a lot of different things they have on offer. If you just wanted a scone and a pot of leaf tea it’s probably under £10