I now know when I will be in Buxton, and I've had an extra date added, so that's 5 dates.

The July dates for the show are...
12th - 8.30pm
13th - 10.30pm
15th - 10.30pm
18th - 8.30pm
20th- 10.30pm
(ignore the poster info it is wrong)

Here is a page with more information