This looks fun for the kids. http://londonbridgecity.co.uk/events/2017/december/elpless-elves-trail http://londonbridgecity.co.uk/events/2017/december/elpless-elves-trail-16-december
Cyclists are also a danger, a friend of mine was knocked over by a cyclist riding extremely fast through the red light at a crossing. She had bleeding on the brain because of what happened to her.