Rachel Riley has been temporarily replaced on Countdown by a tattooed YouTube mathematician who teaches equations in his underwear. Dr Tom Crawford, known for his Tom Rocks Maths channel on the ...

Rachel Riley has celebrated tude innuendos returning to the show in an apparent swipe at her former Countdown colleague Anne Robinson. The maths whiz and the show’s lexicographer Susie Dent reportedly ...

Mathematician Dr Tom Crawford will stand in for Rachel Riley on Channel 4’s Countdown while she takes a short break to work on another project, it has been announced. Dr Crawford is well-known for his ...