In need of a coffee It is no qualification for the post of prime minister to be able to attract service in a coffee shop, which is just as well for David Cameron. "I'm in the middle of serving somebody," he was told when he asked for a takeaway coffee at the Sandwich Box Plus, Plymouth, en route to an Armed Forces Day event. Certainly we wouldn't want any favouritism. The First Lord of the Treasury isn't automatically first in the queue. But something very similar happened in Italy, when Mr Cameron asked for two cappuccinos to be brought to a table outside. The waitress was too busy. Does Mr Cameron repel cups of coffee because of something in his genes or because of the way he was brought up? In either case, there must be a way of avoiding these embarrassing scenes in future. Perhaps he could invest in that sterling invention of the Scottish scientist Sir James Dewar - the vacuum flask.