Bird shaped like a moorhen or coot, but grey in colour and without the distinctive beak colourings of with of those species.
No interactions present.
The white stripe (and white undertail patches) on an otherwise very plain grey-brown body shows that this is a Moorhen.
Young Moorhens don't get the distinctive red and yellow beak until they are mature, so individuals in their first winter lack this and have a dark bill.
Lat/Lng: 51.60493, -0.61786
OS grid ref: SU958904