The Last Night of the BBC Proms is not exactly what most classical musicians would consider high art – in fact, it’s mainly a bunch of flag-waving and patriotic folk songs with a raucous crowd singing along – but it couldn’t be much more popular, and so this week, shortly after being appointed the new chief conductor of the BBC Symphony, Jiri Belohlavek went through the usual motion of dashing the faint hopes of critics across the UK and assuring the public that Last Night would continue to be just as it has always been.