I went back to West Park yesterday, taking my (very heavy) biggest telephoto lens to get better shots of the young cormorant which is currently hanging round on the lake. As luck would have it, the bird was actually perching on a much nearer rail. It kept posing, spreading its wings and slightly shaking them to dry the feathers. I took a lot of pictures!
It’s possible the bird is staying overnight at the Pendeford Mill Nature Reserve, where one has been seen by @marcouccellini_ leaving in the mornings and returning in the evenings.