Admittedly not the prettiest of pictures, but I'm hopeful this is another water vole latrine. It's a fortnight since we've had any sightings but there are some possible prints under the bridge, and I've been looking in Rob Strachan's excellent 'Mammal Detective' handbook and rat droppings are definitely blacker, bigger and pointier than these.
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But the only mammal I saw tonight was a rat. Disappointing after February's showing.