And blow me, as soon as I looked at it, I noticed something. Again, it’s to do with major transport routes. While Simonds takeovers followed the Great Western Railway east to west, John Smiths mostly went north and south. Approximately following the A1 and East Coast mainline. Take a look:
Black: original brewery
Green: <= 1920
Red: 1930 – 1945
Orange: > 1950
Though in addition there’s a little leakage over the Pennines to Lancashire.
I’m definitely going to continue with this. It’s so revealing.