In reply to teapot:
I can't help you with the one day course in the Peak, but i can offer some advice on your longer course in summer.
Last September i was on a weekend workshop run by Lukasz Warzecha. I have to say that it was absolutely fabulous. It was only a weekend but we had such an action packed schedule that we learnt loads. It wasn't just how to take good images that we learnt, but how to edit them, and then how we should go about getting them published if that was what we wanted to do.
I've no idea if he will be running one in summer but it's worth asking i reckon. Here is a link to one he is doing this weekend for a better idea:
http://blog.lwimages.co.uk/workshops/
Hope that helps and good luck with the photography.
Dan