Peter Rhodes on holidays, posters and standing up for Auntie NHS

The best election posters are the simplest: that unforgettable, endless line of unemployed Brits (“Labour isn't working”) or the equally long NHS line with Labour's anti-Tory caption: “The doctor can't see you now.” Here's a prediction. Come the next general election the Conservative Party poster attacking Labour's policy on migration will have one very simple image. An open door.