Some might say that Jeremy Corbyn is cloth-eared, tone-deaf, socially inept but on Monday morning, as the death of the pop artist David Bowie scrambled the agenda on Radio 4’s Today programme, he was as graceful and twinkle-toed as Bowie himself. The opposition leader had been invited on to the ‘big slot’ just after the eight o’clock bulletin to talk about his ‘shock’ reshuffle last week.