If you're interested in learning more about herbal medicine, I'd suggest to get some books (see my blog post for recommendations) or go on a course. The internet is great for finding bits and pieces of useful information, but it's hard to get a decent foundation.
Here's a list of short courses for herbal self help - online and around the UK and Ireland.
And here's a list of long courses for becoming a medical herbalist.
There is nothing in the Nottingham area as far as I'm aware for either type of course, so an online course would be your best bet. I know the Heartwood online course is of very high standard. If you're interested in this let me know and I can give you a discount code for a 40% reduction of the course fee.