By the British government?
Those who are there at the request of/working for the British government, of course you'd expect them to be looked after, but people who've gone for their own reasons, tourism or private work, surely the risks of going to an unstable region are considered before you go? People went, presumably, for some sort of personal gain, why is it the government's (taxpayer's) job to reduce them? Why not their employers or their personal insurance, or themselves?
I'm obviously wrong, as it's so accepted that government should, but why?