Complex sentence: In 2007, John became a mentor on BBC cooking show Kitchen Criminals, a judge of ITV cooking show "Britain's Best Dish" and in November 2007 he appeared in ITV's "I'm a Celebrity, Get Me Out of Here!".
Split into simpler sentences: In 2007, John became a mentor on BBC cooking show Kitchen Criminals, a judge of ITV cooking show Britain's Best Dish. In November 2007 he appeared in ITV's "I'm a Celebrity, Get Me Out of Here!".