There are advantages and disadvantages to being held hostage by a volcano in London.
In terms of disadvantages, if you are being held hostage with hundreds of thousands of other people trying to escape, I’ve discovered the UK island is virtually impossible to leave. If you aren’t flying out, your only options are by train or ferry to reach the European mainland. And if you and hundreds of thousands of other people are trying to leave at the same time, your chances of finding a spot on a train or ferry in time to reach a functioning airport with an actual seat on a plane back home for you are quite slim. London is also a very expensive city to be held hostage in. Yesterday I had a tuna sandwich and some sort of fruit juice concocted from every kind of artificial flavor and sweetener one could imagine. It cost me 5.40 GBP. That’s a whopping 45 Egyptian Pounds. In Egypt, I could buy a really nice dinner with that.
In terms of advantages, if you do have the money, there are quite a lot of things one can busy oneself with while one’s volcanic captor is busy spewing ash.