Hiya freda
It seems you already have a lot of early-bird responses from the Mudcatters in and around London and that's great if that's where you want to go. Do you?
Alternatively, if you wish to visit elsewhere there are lots of us located all around the country! For instance, I am in Stratford-upon-Avon in Warwickshire, with its Shakespeare connection and there are lots of things to do and people to meet around here too.
Although the middle/end of August is not the easiest time of the year, with all its festivals etc, I responded to Naemanson's thread on visiting the UK like this!
I hope it all goes well for you!
"Clouds are upon a summer sky ...!"
Alan