I was working on Baker Street back then. I must have got off the Met line at Baker St maybe 20 mins before the circle line train went through and I was at work by the time news of the explosions started coming through. There was a lot of worry in the office about colleagues who hadn't made it to work that day. The mobile phone network was completely overwhelmed, so no-one could even contact them. No-one I knew was caught up in it though.
I remember ringing home to let mrs mx know I was OK, and she hadn't heard about it at all.
By lunchtime, the senior guy in the office decided everyone was too shook up by the events so we all went to the pub.