At long last I have been round the Didcot Power Station. It is huge! It is quite simple too.
The basic processes were explained at least 4 times. After that I have grasped the fact that the coal is pulverised, then blown directly into the furnace/boiler, then the super clean/pure water is heated to some fantastically high temperature of steam. Steam plus turbines = electricity and hey presto through the big wires into the pylons we know and love/loathe across the fields round here.