It was, to adapt the famous Sun headline from the 1992 general election, Ulez wot won it. The Conservatives’ narrow hold of Uxbridge and South Ruislip was, as Angela Rayner admitted this morning, down to London mayor Sadiq Khan’s dogged determination to inflict a £12.50 daily charge on the drivers of diesel cars more than seven years old and petrol cars more than 15 years old.