Rachel Riley’s Countdown replacement has been confirmed as the presenter steps away from the daytime game show for three ...

Rachel Riley will be replaced as the show's co-host by a mathematician and YouTuber while filming a new project .

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

A change from the usual glamorous number expert Rachel, Cambridge and Oxford university mathematics boffin, Dr Tom Crawford, ...

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 ...

Mathematician Dr Tom Crawford will stand in for Rachel Riley while she takes a short break to work on another project. Dr ...

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

Rachel Riley is set to take a brief hiatus from Countdown, with mathematician Dr Tom Crawford stepping in as her temporary ...

Rachel Riley is set to be temporarily replaced on Countdown by mathematician Dr Tom Crawford, as she takes a brief hiatus ...

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

Dr Tom Crawford’s videos of teaching equations in his underwear have helped him attract more than 200,000 subscribers ...

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