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Our penchant for a warming winter roast is causing a problem. ÌýThe waste cooking fat gets washed down the drain, where it clogs the sewers and gives the water companies a major headache.Ìý But there could also be disastrous consequences above ground, with blocked sewers and drains contributing to major flooding. ÌýKeeley goes down into the sewers below London with Thames Water to discover the secret horror lurking beneath our feet: a ‘fatberg’ the size of a Boeing 747!ÌýÌý

Jules is on the Essex coast, joining a team racing against time to save an important archaeological site from the ravages of winter seas. Can they beat the tide and complete the dig before it’s too late? With the help of some specialist photography, they are able to make a 3D-map of some fascinating discoveries.

Matt went to visit a farmer, who lives on the shores of Loch Lomond, and has an unusual way of commuting his horses in the winter - by swimming them from island to island in the loch’s chilly waters!

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Now is the perfect time to manage your trees while they lie dormant in the winter season. Hamish Thomson from the Woodland Trust is back to help Paul implement the plans they made for his woodland back in the autumn. With help from a band of young volunteers, they start a huge tree-planting project helping to future proof Paul’s woodland for years to come.

Margherita’s in Wiltshire meeting an inspirational farmer using the power of the countryside to help turn around the lives of teenagers from challenging urban schools – helping them flourish in education, at home and in the community.

Richard Taylor-Jones has filmed wildlife all over the world and in the process has developed a host of skills for capturing intimate shots of animal behaviour.Ìý He set himself the challenge to film three animals, which are typically found out and about in winter in the Scottish Highlands.