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Five more stars are hoping to impress in this new week of heats: Olympic swimmer Rebecca Adlington, singer Rachel Stevens, actor Tyger Drew-Honey, radio presenter and DJ Dev Griffin and presenter and performer Debbie McGee.

The first ‘mystery box’ challenge produces everything from an uncooked cottage pie to a spaghetti Bolognese that’s hotter than lava. The professional kitchens prove to be a steep learning curve, but it’s the final round – where the stars cook their own two courses – that really sorts the cooks from the ‘I don’t even know where my kitchen is, I always eat in fancy restaurants’ types!