“I’ve never met anyone like Joey before in my life.” So said the snooker player Steve Davis, after watching the beauty queen Amy Willerton teaching Joey Essex to tell the time by drawing a clock in the dirt with a stick. Davis’s total bewilderment offers a clue to the enduring appeal of the annual celebrity hazing show I’m a Celebrity, Get Me Out of Here!. Today, it turns 20 (and later this year, it will be returning to the Australian jungle after its Covid hiatus in Wales) but, thankfully, it shows no sign of growing up.