In March 1999, five bus drivers who transported the factory workers were charged in connection with some of the murders.

BBC: Mexico's serial killer fears renewed

Officers have now released CCTV images of some men they want to speak to in connection with the attack, which happened as the bus was near the Westminster School.

BBC: Woman, 19, sexually assaulted on West Bromwich bus

The latter has been winning of late, hence Crossrail, the high-speed connection to the continent, and the upgrades of London's bus and Tube networks.

ECONOMIST: Londonism and its adherents