The Muslim prophet, Mohammad, didn't like dogs.
LONDON: Muslim passengers may not be touched by sniffer dogs of the British Transport Police after complaints that the practice is against Islam. According to the religion, dogs are deemed to be spiritually “unclean”.
Since the IRA and its offshoots have been quiet the last few years, I'm not sure who else has been bombing London transport the last few years.
On July 7, 2005 fifty-two London commuters and four suicide bombers were killed in a coordinated bombing attack. All four suicide bombers, including their leader, Mohammad Sidique Khan, were fundamentalist Muslims.