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The reddish colour on the back is indicative of Bank Vole. Although this animal appears to have a very short tail, a closer look reveals an abrupt end to the tail with no tapering to a point. This suggests that it has lost part of its tail to a predator of some kind or, at least, has lost part of its tail in an accident of some sort.
I have agreed with bank but what was concerning me was the tail.
I was also wondering whether the tail was naturally short, bitten off, or just hidden behind a piece of bark or whatever. It does look to end abruptly, but I can't decide even with zooming in whether it's hidden or bitten! The reddish colour of the fur does suggest bank vole.
OU Certificate in Contemporary Science
I've added a couple more pictures which might help with the ID. There were two voles together so the photos may be of either. I did think at the time that one of them seemed to have a short tail when looking through binoculars but hard to tell when they move so fast!
As one of them has a longer tail and the other's tail does look chomped, plus the reddish fur, I'll go with bank vole.
Lat/Lng: 53.1066, -1.5472
OS grid ref: SK304566
Amongst debris beside canal.