I had a report of an otter being seen this morning about 9.30 am by David Cotes, out walking his dog towards Doncaster on the river bank below the lock. He was convinced it wasn't a mink, which we know are also around, due to its size, head and tail. Otters have been seen occasionally over the past few years, which is a good sign of their return to the river. If anyone else has seen them, they might like to email me: firstname.lastname@example.org. Any photos would be especially good, but I know they are quite elusive and quick to disappear.