Over the past ten years we've accumulated a lot of guitars, keyboards, amps, posters, platinum discs and all sorts of nostalgia. From December 17 until December 31, we're going to auction them on eBay.

All items will either be signed by the four of us, or accompanied by a certificate of authenticity, again signed by all of us. All proceeds will go to Kids Company, an incredible charity that helps vulnerable children and young people in London.

The auction starts at 5pm (UK time) on Thursday 17 December and ends at 5pm (UK Time) on Thursday 31 December - more details