He's been a mainstay of Dragon's Den since it launched back in January 2005, but now - as it prepares to air its 23rd season - Peter Jones has revealed one of his hidden "tactics". When host Roman Kemp asked him about using "some psychology tactics in the Den", he confirmed: "I've never really disclosed them. "When I was asked to be a guest Dragon, I simply couldn’t refuse. "Having been a guest Dragon before I’ve got more of a bite this time and you’ll see that come through," Neville said. Dragon's Den airs on Thursdays at 8pm on BBC One and iPlayer.