South Downs Way, Sussex
'Celebrate the South Downs becoming Britain's newest national park by walking its length, from Winchester to Eastbourne, on the South Downs Way National Trail,' says David. It's a perfect long-distance walking route for winter as you can feel high and remote on the chalky hills, but it's rarely more than a few miles to the next village's comfortable pubs and B&Bs. The whole distance is 107 miles and takes around eight days.
Distance 9 miles (www.southdownsway.co.uk)