Reading was also 200V, up to around 1962. Parents still have a few things which had to be converted - dad's B&D drill, and I did keep the 3kW autotransformer the electricity board fitted inside their washing machine, after the machine itself was scrapped.
I have a book somewhere which lists the supply voltage and frequency in all UK towns prior to standardisation.
DC supplies continued to be available in some areas until about 1980, where there were enough industrial users taking the supply, for example cinemas for their arc lamps. University College London had the 200VDC (or was it 220V, I forget now) wired into all the physics labs. By the time I left in 1983, they had installed their own rectifier in the basement, as the street supply was discontinued.