Well whatever they say about the quality of NHS food (having tasted it, it can be perfectly reasonable these days) it is an added cost to the taxpayer.

If people decided they fancied fast food, they may not take the hospital food (you have to tick a sheet of paper at the moment to select your menu choice; why not invent a “no thanks” option?)

Therefore the costs decrease, revenue increases due to rent of the business units, and patients have more choice.

I cannot think of a single reason not to permit this to happen!