Weasel - Carsington Water

Having seen the Black-necked Grebe (below) I walked along the dam wall and was about 3/4 of the way to the sailing club at Carsington when I noticed a Weasel running towards me over the rocks. I managed a few photos, which wasn't easy as it was running very quickly and kept disappearing in the rocks. 
Looking at the photos I did wonder weather it could have been a Stoat but I think the tail is too short and that the darkening on the tail tip is just from the heavy rain. I haven't seen any Stoat this year and this is only my second Weasel having seen one near Bakewell in the Spring.

Weasel - Carsington Water