Very pleased to see this little chap on the site today. Sorry the pictures aren't great, I had to zoom in and only had my small camera.
Can you see him? It was more ginger in colour in real life.
I think it's a weasel, rather than a stoat, as it was very small. Stoats have a black tail which we didn't see.
He was certainly fast, dashing about chasing a mouse we think.
Mice are their preferred food, so a welcome tenant on the allotment!