After the 2005 bombings in London, which targeted public transport networks and the people on them, the security services are understandably concerned about sim

After the 2005 bombings in London, which targeted public transport networks and the people on them, the security services are understandably concerned about similar attacks: https://en.wikipedia.org/wiki/7_July_2005_London_bombings https://en.wikipedia.org/wiki/7_July_2005_London_bombings