I live in the Middle East and I'm planning another ELCS for my next birth. For my last one, they wouldn't let me eat from midnight before, obviously, but what nearly finished me off was they still wouldn't let me eat for another 12-24 hours afterwards (I can't remember exactly how long, but I have never been so hungry in my life). I had twins and the fact that I was half starved really did not help me face the enormous life challenge that I was facing! And my milk didn't come in for days, which may have been related.
IF it's UK standard practice, I am happy to go along with it this time around, but if as I suspect they do actually let you eat in the UK after a c section then I am going to smuggle my own food this time and make damn sure I eat.