We are all okay here in the UK. My wife indeed works in central London - at Shell Centre next to the London Eye across the river from Big Ben.
She travels into work by train - above ground - into Waterloo station. The station is connected to Shell Centre by a walkway bridge.
As of right now, she has at least heard from everyone she works with that did not make it in this morning. Most were stopped along the way when the incidents occurred and public transportation came to a complete stop.
Actually, the only question now is how to get my wife home. I will try to keep you informed of any and all news.