I can't confirm one at Hatton, but I've seen one at Wakefield on the Calder & Hebble and I've seen one near Tarleton on the Rufford Branch of the Leeds and Liverpool.
The one at Wakefield was swimming in the lock, and a bunch of gongoozlers were trying to prevent me coming into the lock so I didn't scare it, in fairly brisk river conditions. Err, No, I don't think so!
They were also discussing how to fish it out of an empty lock with a too short branch, and one of them was already on the ladder flailing around like an idiot. I just drove into the lock carefully, and MrsBiscuit fished it out with a landing net.
Someone then called the RSPCA to come and rescue it, and I suspect they simply took it round the corner and released it back into the river!