Kate Humble's Coastal Britain

The naturalist enjoys an 11-mile walk in Exmoor along the South West Coast Path, regarded as one of the most beautiful such paths in the world. Starting at Porlock Weir, Kate heads to St Bueno's, a tiny parish church that seats just 33 worshippers - and which holds a dark past. She then heads inland to see the valley that inspired RD Blackmore's 1869 novel of outlaws and revenge, Lorna Doone. At Lynmouth, Kate rides the world's highest and steepest water-powered railway, before finishing her walk seemingly on top of the world in the Valley of Rocks.

On a 15-mile walk in North Yorkshire, Kate sets off from the picturesque settlement of Robin Hood's Bay, where archaeologist Maria explains how, in the 18th century, the fishing village's position made it an idea drop-off point for contraband shipped from Holland and France. From here, Kate heads south along the coast, meeting up with geologist Will, who reveals what dinosaur footprints can reveal about the creatures that once roamed the area. After arriving at her destination in Scarborough, Kate dons her wetsuit to join a group of swimmers braving the North Sea.

Starting in Dorset on Stonebarrow Hill, the naturalist walks a 13-mile stretch of the South West Coast Path. Her first stop is at Charmouth, a place well-known for fossil hunting, where local girl Mary Anning found an ichthyosaur in the early 19th century. At Lyme Regis, Kate discovers the lengths and costs engineers have gone to in order to protect the town, before visiting a local mill listed in the Doomsday Book. After a spell bird spotting in the Seaton Wetlands, Kate enjoys a tour of the area's limestone mines before making her way to Beer Point, which boasts wonderful views of the sea.

Kate walks an 11-mile stretch of the Suffolk coastline - one of the fastest eroding in Europe. She also learns about the ancient art of thatching, makes flavoured gin, goes foraging and visits one of the UK's largest freshwater reed beds.

The presenter walks a 13-mile stretch of Yorkshire coastline. Starting at the highest point along this coast, Kate heads down into the fishing village of Staithes, which was once home to one of north Yorkshire's largest fishing fleets. In Runswick Bay, she takes to the sea with the volunteers in the newest rescue boat. Kate then heads on to Whitby, which inspired Bram Stoker's Dracula after he stayed there in 1890.

Kate walks 12 miles of Suffolk's shingle coast, starting at Minsmere Nature Reserve, and later heads through the protected wetlands at Snape Maltings in a kayak. Her final destination is the 10-mile-long shingle spit at Orford Ness, a former military test site which is now a National Trust nature reserve.