“I did Metallica with the horns [and] a Rammstein version of Scarborough Fair – that was a particular highlight for me.
"It’s always an unknown quantity. You never quite know how much a style or a genre resonates with someone to the point that everyone in the audience will know that kind of music. That’s the thing.
"I wrote a song based on the New York, austere, post-punk industrial-cool genre, and only a handful of people knew what I was taking about. Sometimes you have to cast your net into a place where people know what you’re talking about.
"But weirdly, I did a dubstep hymn - I do a dubstep version of Jerusalem - and people seem to know what that is, and that surprised me. I thought dubstep was a London underground DJ kind of thing, but it must have morphed into the mainstream due to scamps like Skrillex.”