Liverpool fans, a significant number at least, booed the national anthem at the Carabao Cup final at Wembley yesterday. It wasn’t the first time this has happened – it’s been going on since the 1980s – but it was the first time since the monarch was diagnosed with cancer. This added a certain poignancy to the ‘save’ bit of the anthem, and might have been expected to persuade the Liverpool boo-boys to take the afternoon off. But