Yesterday I was filtering along the outside of a long queue of stationary traffic in Romford. Fortunately I was moving quite slowly - around 10mph. This gave me time to see the woman pushing a pram who had decided to cross the road from between two vans. Obviously she had assumed that it was safe to cross as the traffic on her side wasn't moving and there was no traffic coming the other way. It was a useful reminder of the need for caution when filtering in built-up areas. Motorcycle vs pram is not a contest that I would ever want to participate in.