Nickel was commonly used in the making of coins, however, due to the metal being a skin allergen for some people, and the fact that today cheaper metals are available the element is no longer widely used in coinage.

I want to be part of the resurgence of things that are tangible, beautiful and soulful, rather than just give in to the digital age. But when I talk to people about this they just say, 'Yeah, I know what you mean,' and stare at their mobiles.

With the song 'This Christmas' I wanted to do something that was kind of different. I mean, Donny Hathaway is an amazing artist. So I wanted to bring my flavor to the song so when people over the age of 45 or 50 hear it they'll be like 'OK, he did his thing with that record.' It's like I can appeal to everybody and not just a younger demographic.

So Harry Potter came in and it is nice that I have kids of the right age. I took them to London and they walked around the set and met Harry Potter and that is thrilling.