Funny you should say that - it was the same in Basingstoke at around 2 o'clock today - we saw 4 marked and 1 unmarked cars in the town centre just parked up waiting for something...
Must have been thanks for that, I didnt think to check the twitter for the helicopter crew. Great to see such a police presence for something so important like that. I reckon they must have sent every officer on duty there.