So, putting everything together... a weekend would be best, and it seems like 8/9 July is one that works for everyone.
We have people coming from Leeds, Liverpool, Derby, Nottingham, Rotherham, and Brighton. That's a lot more north than south, so it seems to be best to find somewhere that suits all the north folks, and Crane can join us by train.
I think we have two main options:
(1) Hold the meet in Leeds -- it's well connected by train, everyone should be able to get there, and two of us live there so it'll be easier to find somewhere for all of us to go. We could meet up in the train station at about 12, have lunch together, and then (depending on the weather) go to a park or walk around the town centre while chatting and getting to know each other.
(2) Choose a location in the middle of all of us -- on looking at a map, that means most likely Sheffield or close to there. Everyone should be able to get there and no-one is prioritised over the others, but the fact that none of us actually lives there could be a disadvantage.
Thoughts? Should I put up a poll?