John Craven and Ellie Harrison are in the Peak District. John meets Roy Taylor, who has worked for the RSPB for 20 years. Diagnosed with motor neurone disease in autumn 2013, he is now entirely dependent on a wheelchair, but this hasn't stopped him. John discovers Roy's inspirational story and his aim to make the countryside more accessible to all. John also finds out about a new piece of kit called the mountain trike, which allows wheelchair users to get over much rougher terrain and therefore enables them to explore places that were once unreachable. The National Search and Rescue Dog Association is 50 years old this year. Ellie discovers what it takes for trainers and search dogs to become fully fledged life savers. She also visits Lane Farm End Trust, a working hill farm where disabled and disadvantaged young people get to connect with nature. One particular rare breed of pony, the eriskay, is making a huge difference. Anita Rani puts on her walking boots to explore the magnificent Pennine Way, discovering how it has changed in the 50 years since its creation. Adam Henson discovers the norfolk horn, a breed of sheep which helped make East Anglia of the Middle Ages rich. One in five people in the UK have hayfever, and more are suffering from it every year. Tom Heap asks what's causing this increase and finds out if there is anything we can do to stop it.