On what we know so far, this sounds totally OTT. A police spokesman told radio 4 an investigation to identify the officer is under way.
I've no problem with children riding on the pavement. I understand why many adult cyclists don't feel safe on the road but I'm increasingly irritated by cyclists on off road footpaths, for example in our local woods and parks, who cycle at furious speeds, and don't use/or even have, a bell on their bikes. Bikes are not allowed on the footpaths around our reservoirs but use them. I'm live and let live, and don't object to cyclists using the foot paths, providing they show respect and patience around children, people and of course dogs. Dogs are allowed off lead, it's a fantastic walk but becoming unsafe because of cyclists.