If you're helping out your uni student kids financially, how much is it costing you per month?

[ToofFairy]

Trying to get a rough idea of how much it will cost to put the kids through uni. I don't expect they will get much more than the basic student loan. Not London prices.

Minimum loans here.
I pay the rent (gently encouraged them to keep it as a low as possible without slumming it!).
Plus £20/week towards food.
Everything else is funded from their loans, part time jobs or savings.