Countryfile Spring Diaries - Season 3

John Craven is on the Malvern Hills, celebrating their spring beauty and wildlife and also their cultural impact as the inspiration for family classics such as Tolkein's Lord of the Rings and CS Lewis's Narnia. Keeley Donovan is in Scotland to find out about dogs being trained to help people with dementia in Dundee. She visits inmates at HMP Castle Huntly nearby to learn how prisoners here help to train these dogs. Margherita Taylor is on the trail of some futuristic foods in Norwich, home to the John Innes Research Centre. Among them are purple tomatoes - specially developed to be super disease-busters. Paul Martin discovers how to fight an invasion of moths in his home. Jules Hudson is on the Gwent Levels investigating how a new 15-mile, six-lane extension to the M4 motorway through south Wales could devastate wildlife. Matt Baker is in Lincolnshire to discover how British flower farmers took on the Dutch tulip invasion.

John Craven celebrates the beauty of the Malvern Hills, while Keeley Donovan is in Scotland to investigate how the New Zealand flatworm, an invasive species, is destroying the earthworm population. Keeley gets the lowdown on how to keep them at bay. Paul Martin joins in a spring-clean on a stretch of canal in Birmingham. He discovers how Dhruv Boruah and his extraordinary bike boat are causing quite a splash. Horrified at the haul of rubbish retrieved from the water and the canal side, Paul discovers what harm litter is doing to wildlife and potentially to humans. Margherita Taylor is at Secret World Wildlife Rescue Centre in north Somerset for the first of three special Countryfile Spring Diaries reports. Jules Hudson is at 17th-century Worsbrough Mill in South Yorkshire, where the miller is retiring and the search is on to find a replacement. Matt Baker is out at sea as he joins the RNLI for a high-octane training exercise.

John Craven enlists with firefighters in south Wales while Paul Martin discovers that the Rhondda Valley - one of the wettest places in the UK - is braced for around a thousand fires. In Malvern, sheep are nature's fire prevention officers but these animals have vanished from the valleys and the vegetation is running riot. Fire chief Craig knows how to tame the landscape. Paul also meets Becky Davies of Natural Resources Wales and discovers how to safeguard lives and creatures against the worst. Steve Brown's in a Kent garden which needs cat-proofing. Guy Barter, chief adviser to the Royal Horticultural Society has a few tricks but Prof Mark Fellowes, who has studied cats and their territories, reckons Steve could be on to a losing battle.

Keeley Donovan is on the shores of Loch Ness finding out about a cutting-edge trial by the ambulance service, where satellite technology could save lives in one of the most remote areas of Britain where patients can be as much as five hours away from the nearest hospital. While John celebrates some of the country's most beautiful villages to visit in springtime, Margherita Taylor's in the Yorkshire Dales in Hudswell. With house prices soaring it's getting harder for villagers to stay in the communities in which they work and have grown up. Hudswell is benefitting from a charitable windfall and Margherita meets a family who it has enabled to stay. In Spennithorne she checks out discounted homes which are helping villagers avoid the property pinch.

Jules Hudson is just up the road in Herefordshire with his dog Teddy to sniff out the spring dangers lurking outdoors and in homes which could harm pets. From bluebells to daffodils, reptiles like the adder on the loose and Alabama rot, which can carry a death sentence to dogs from just a roll in the mud, vet Charlotte Watkins warns of the perils and how to avoid them. Paul Martin is at smallholding school in Somerset with two wannabees looking to live the good life. They've already got chickens and will soon be welcoming pigs, but along with Sally Morgan, who runs courses for smallholders, Paul wants Tom and Faith to be braced for the ups and downs. Sally has some hot tips about what to grow to break into burgeoning markets, plus plenty of tips on squabbling hens, rooting pigs and planting, and as Paul knows from having his own smallholding for nearly ten years, it can be a wonderful life-enhancing experience.