Slade was the longest serving presenters in the show 's 22 - year run .
Under Davies 's direction , the format of the series shifted from magazine show to drama , with plots frequently centring on harebrained young Welsh presenter Ben Slade and his increasingly elaborate inventions .
presenter was the longest serving presenters in the show 's 22 - year run .
Under Davies 's direction , the format of the series shifted from magazine show to drama , with plots frequently centring on harebrained young Welsh presenter Ben Slade and his increasingly elaborate inventions .