Thanks for the replies.
I've never heard of blacktoft sands but after reading about it it sounds good so I'll definitely go there. I'm a regular visitor to Attenborough but there's only a couple of hides there.
I went to Brandon Marsh yesterday for the first time, I thought it was good but I was a bit disappointed that there were no woodland based hides because there were a lot of woodland birds around but it made it much harder to get photos.
Pennington Flash, Martin Mere and Fairburn Ings are also ones I'm going to try