It appears that in amongst all the splashing taxpayers’ cash on PR firms and campaign groups while approving prohibited political ads on the tube, Sadiq has forgotten one important thing this week. His official swanky black BMW hasn’t had its MOT renewed – DVLA records show that it’s now almost a week out of date. Not a good look for the boss of the capital’s transport infrastructure. With a massive 4.4-litre engine it’s hardly very environmentally-friendly either…