At present it's best if you just contact Tim by phone. His phone number is on the meetings page.
If you recently (the last couple of months) tried to contact us using the form that was previously on this page, my (Jonathan's) apologies... due to a computer failure, messages were not being sent, even when it said they were!
Moral: never trust computers. If you don't hear anything, try contacting a real human being.
Here's a link to the meetings page, with Tim's phone number. (I won't repeat it here, because if it needs to be changed, then I only have to change it in one place.).