I thought the bus and tube
were simultaneous?
( Flapjack I spay a little mare for you, Thu 7 Jul 2005, 10:59, archived)

Apparently slightly afterwards

( Mykeyboy A massive, salty filing cabinet, Thu 7 Jul 2005, 11:00, archived)

multiple bombs

not just one
( Enigmatic ™                 Voice No More                  ©, Thu 7 Jul 2005, 11:00, archived)

No...
buses exploded about an hour later, so people had time to rush off tube onto buses first...
(Aquai, Thu 7 Jul 2005, 11:00, archived)