I've been rubbish at sorting this out, sorry!
It looks like being either 4 May or 13 April - I'd prefer 13 April, but I realise I haven't been quick to sort this out.
Are people still free and interested on 13 April? Please invite people you know I/we get along with (and let me know if they're coming, since I'd need to reserve space at the Red Lion).
I would suggest meeting from 1.30pm onward. For those who aren't local, it's about a minute or two's walk from Leytonstone tube station.
Is this still good for people? If you've all made other plans for that date, I'll have a rethink...