Is the venue a problem? Would be better to arrange the next business meeting in London?
The Wikimeetup will go ahead in Birmingham, but my questioning is about the efficacy is having the people who are involved with technical matters move to Birmingham for the next session.
My guess is that we should allow as much time as possible to finish the documentation (un-constrained) and set a date for the meeting with the lawyers to sign those documents.
My suggestion? We do all this before 21st January. It would be nice to go to Birmingham feeling that all the work was "done and dusted".