There's an old adage that says confidence isn't about believing you'll win, it's about being comfortable with the fact you might lose. If that's true, then Sam Battle must be the most confident person at this year's Eurovision Song Contest. The musician – who performs under the name Look Mum No Computer – is almost comically unbothered about the scores that may await him (and therefore the UK) on Saturday night. "It could go well or completely wrong - I'm just here for the ride," he says. And