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

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

Rachel Riley will be replaced on Channel 4 show Countdown by a pal as the mathematician takes time away from her usual role ...

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

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

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

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 take a brief hiatus from Countdown, with mathematician Dr Tom Crawford stepping in as her temporary ...

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 fill in Rachel Riley's role on Countdown while she takes a break from the show.

A tattooed YouTuber is replacing Rachel Riley on Countdown in a shock shake-up and has announced the appointment to fans with photos from the Channel 4 set. A change from the usual glamorous ...

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