A Big Dipper?

I went for a walk in Aden Park today as my wife did some work in our allotment.
It was a lovely day and I was hoping I might see a dipper in the river.
I didn’t see a little dipper, but I did see this beauty walking across the water. She didn’t see me, she just nonchalantly waded across to get to the other side.
I felt so lucky to see her.
And to get a photograph......