If anyone doubts that British Telecommunications Plc really has smartened up its act since privatisation, the denouement of one of our Minigram Classics at Christmas makes the point: we reminded subscribers of the Telecom engineer who managed to make a second income driving a London Black Cab on the phone company’s time (CI No 1,084); now we hear that a few months back he was followed by his masters for five days – with the result that he drives his cab full-time now…