We’re not playing fair; that’s a tough choice. Perhaps it would be fairer to ask who he would love to draw the most. Immediately, the answer is: ‘Snape. And McGonagall – they have the most interesting silhouettes.’

The hugely talented graphic designer is a bit of a Potter fan, you see. So when Pottermore asked Olly to create new covers for the Harry Potter eBooks, he jumped at the chance.

‘Harry Potter has always been my favourite. I skipped [Philosopher’s Stone] because I was being a weird snob about it – I was ten. Then by the time Prisoner of Azkaban was out, I remember my mum saying I should read them.

‘We were going on holiday and she bought [Azkaban] for me, but she got me the adult covers of the first two novels because I was still being a snob.’

Even then, covers mattered.

Olly’s striking reimaginings of famous movie posters and his distinctive art style show his flair for creating iconic imagery with a twist. He says he was originally inspired by modernist graphic designers like Saul Bass, Paul Rand and, more recently, Jason Munn.

‘He’s a great gig poster designer. He’s the guy that really turned me on to the double image approach to things.

‘I like things to have more than one layer. The initial, “Oh, that’s an attractive image,” then it’s got a secondary reveal when you look closer. It’s something that I’ve always enjoyed doing.’