Weatherman Derek Brockway heads off on two contrasting walks at opposite ends of the country. He sets off from Llanberis in the footsteps of quarry workers, along paths and tracks through an ancient oak woodland and on through the impressive old Dinorwig quarry with spectacular views of Snowdonia's highest peaks and the valley below. Derek then heads to Llanelli for an 11-mile walk beside the Loughor estuary along a coastal path that's an ideal training route for speedy wheelchair athlete Richie Powell.