London has explosions

Reports are that there are deaths and many serious injuries in some six explosions in London this morning.
Nice timings guys! Either AQ or PIRA lost no time in following upon the 2012 Olympics award to demonstrate that the transport infrastructure we boasted about in our presentation was vulnerable. I can imagine the fuss at NSY. Doubtless, a few of the Anti-Terror guys will have deployed to G8. Six crime scenes is a lot to handle forensically so helicopter activity at the G8 site will have increased as they try to get bomb squad blokes back to the Met. If this gets publicised, it will add another dimension to the concern that the bombers sought. Hopefully, the one on the bus - which seems out of the pattern - was an own goal but the benefit of this must be limited if is Muslim extremists who happily suicide bomb anyway. Any structural engineers out there who can comment on explosion in a tube train tunnel - how long is that likely to put them out of service?