Not particularly positive news, Thorpe Marshes (where I visited a couple of weeks ago) has had dogs running off leads which have killed some cygnets.
Norfolk Wildlife Trust said about the three killed cygnets:
“One of them was witnessed by somebody who is a regular visitor to the marshes and it was very upsetting for them to see. The mute swan had moved her nest to a dyke near a footpath, but that does not excuse the owners of these dogs. They should be kept on leads. We understand that people like to walk dogs, but running them off a lead in a nature reserve is not a good idea. We are appealing to people to be sensible and responsible”.