This leads to another thought. What if in 1923 the Grouping was done differently, done more along the lines of later BR and franchise dividings up of the network.
If, say, the government created a London and Home Counties Railway out of the SECR, LBSCR, GER, Metropolitan and the suburban lines of the LSWR and the lines going north. And then the rest of the LSWR was grouped with the Great Western.
Then we could imagine all those Drummonds and Uries getting Swindonised.
OK, I've triggered a fatwa now ...........