Wait a minute. A Greek ship, carrying coal, is sunk by Yemen? How exactly is that a British problem?
Are we back in 1925?
I agree with your point, but FWIW, the fact that it's a Greek owned vessel, means less than nothing.
Most of Britain’s imports and exports travel through the Suez Canal, which is why Britain has retained a sovereign base in Cyprus and has reopened a base in the UAE. It is very much in the UK interest for access to the Suez Canal be unimpeded, perhaps more so than it is for the US, which has easy access to most of it’s major trading partners directly over the Atlantic or the Pacific without having to traverse choke points.