He helps a couple restore a family cottage in Derbyshire. Plus: skincare made from waste tomato ketchup in Dragon’s Den. Here’s what to watch this evening

8pm, Channel 4The celebrity architect returns to meet people taking on huge building projects for powerful personal reasons. He starts in Derbyshire, where married couple Lauren and Lee have inherited an old cottage from Lauren’s beloved grandparents in Matlock Bath. It’s going to need a complete remodel of rooms and a lot of wall demolition – but is her attachment to the home enough to stick with such a mammoth project? Hollie Richardson

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