RACHEL Riley has been temporarily replaced on Countdown – by a YouTube star. The Channel 4 words and numbers show will ...

Rachel Riley replaced by 'brilliant mathematician' on Countdown - Riley is taking a short break from the Channel 4 show ...

Countdown 's Rachel Riley will be temporarily replaced by YouTube math star, Dr Tom Crawford. It was announced that Riley, ...

Mathematician Dr Tom Crawford will stand in for Rachel Riley on Channel 4's Countdown while she takes a short break to work ...

Channel 4 has confirmed Rachel Riley will be replaced on Countdown while she takes a break, but who is the new host? Riley first took over presenting duties in 2009 from Carol Vorderman, who appeared ...

Rachel Riley has a stern warning for producers should they ever want her to leave Countdown. The 39-year-old is currently on a short break from the show she's been a part of since 2009 ...

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 is set to be temporarily replaced on Countdown by mathematician Dr Tom Crawford. The maths whizz will take a ...

In the Equations Stripped videos, he simplifies and strips back ... “Countdown has been doing that for a generation, so it really is a dream come true to be joining this iconic show to cover Rachel.

Channel 4 has confirmed Rachel Riley will be replaced on Countdown while she takes a break ... In the Equations Stripped videos, he simplifies and strips back maths equations “layer by layer ...