She was dead chuffed, though this feeling was slightly tempered with the knowledge of how much damage this creature will do to the local wildlife.
I managed to film the beastie with my bridge camera. Unfortunately a party of four walkers came along and spooked the mink off. I can't upload video to my website as I have the cheapest most basic plan. Three screen shots will have to do. There is a close up, then a pull back, while the last shot has the back of the mink to you as it turned and dived into the water. It swam off under the water.
If you spot an American mink on or near the reserve then please report this either to the Moor Green Lakes Group or the Blackwater Valley Countryside Trust.