I might take you up on that offer.
I have had palomino but brewed at XT.Also had a few of the not in production brewers
Wild Card brewed at Brentwood
Trumans(everards)
ansbach and hobday(Brewharf)
Lost Brewing(Florence)
3 friends(howling hops)
but I don't count them till they brew on their own plant.
I think Signature brewery is a bit dubious on the main list.
Not wishing to inflame a&h but maybe London wins out on brewery concentration.
Greater London is 609 square miles and has 47 brewers = 1 per 12.96 square miles
I dont recall Yorkshire's 6,066 square miles having 468 brewers just yet.
"Good people drink good beer" Hunter S Thompson
It's going that way, the latest figure I have is 146 breweries; but shall we try that comparison based on per head of population?
Population of London (mid 2012 est) 8,308,400 = 1 brewery to 176,774 people
Population of Yorkshire (mid 2012 est) 5,316,700 = 1 brewery to 36,416 people
looks like London needs to get up to 229 breweries to match Yorkshire