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

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 ...

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

The star of Clarkson’s Farm stepped back from the car genre last year after the hosts of The Grand Tour parted ways ...

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