Hi Suze. Nice to see someone else from Leeds on here!
I like your shot. It does capture the power of the water. It appears that the highlights have burnt out though, which is a bit of a shame. I'm not sure if this happened in camera, or if you've adjusted it a little too harshly (because the shadows seem very dark too). Just something to watch out for!
The Strid is an incredibly difficult location to photograph. I've been and found it very challenging to find the right angle to shoot from. I think the perfect place to stand is in the middle of the water! (Not advisable!)
I went down the more obvious long exposure route on my visit (see below). I think they make an interesting contrast to your shot.