Maths expert and TV presenter Rachel Riley is set to take a ‘short break’ from Countdown – with Dr. Tom Crawford stepping in ...

Rachel Riley is temporarily stepping down from Countdown while she focuses on another project, with newcomer Dr Crawford ...

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

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

EXCLUSIVE: Countdown star Rachel Riley shared her thoughts on leaving the Channel 4 show just days before it was announced ...

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

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

An Oxford and Cambridge university lecturer and YouTuber has made his debut on TV quiz Countdown. Dr Tom Crawford, who has ...

EXCLUSIVE: Rachel Riley shared her thoughts on leaving Channel 4 show Countdown, days before it was announced she will be ...

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

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