It’s a rare occasion that sees politicians put aside their feuds and rivalries to gather together at Westminster Abbey. These moments are limited to weddings, coronations, funerals – and the National Health Service’s birthday. This week the Prime Minister, the opposition leader and a sprinkling of royals joined together to mark the NHS’s 75th anniversary, singing hymns and giving thanks for a system that, according to the latest report, delivers some of the worst outcomes for patients in Europe.