Countryfile Spring Diaries

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.