British citizens? Well, technically yes. But, these were suicidal bombings by paramilitary organizations BASED in the UK. This is a deceptive description.
These are the first suicide bombings in Western Europe, and are thought to have been planned by Islamist paramilitary organisations based in the United Kingdom; the terrorist organization al-Qaeda claimed responsibility.
Wikipedia
Again, the point is that the fact that a company is British-based, or even US-based does not necessarily make it safe. Unless you want the ports federally controlled, there are no guarantees.