To my British friends...do be careful out there. It's a dangerous world, on every corner now....and all brought to you by the "religion of peace".
Hopefully, all those security cameras will pay off. Although I understand that the driver of the first Mercedes was someone they caught earlier related to 7/7, and they let him go due to 'lack of evidence'. I don't suppose it matters how many they round up if they're just going to let them go. There's nothing like a recycled terrorist to make your day.
Please, be safe!