Recently returned from an excellent long distance walk in Nortumberland known as the St Oswalds Way.  Seven days starting in Holy Island and finishing on Hadrians Wall. First half mostly flat but  spectacular coastline dotted with pretty fishing villages and ancient castles – second half mostly moorland and farmland and a lot of it uphill. Waymarking 8/10.  In theory 95 miles but with occasional route finding detours/detours to avoid glowering cows with young calves and added mileage to get to overnight accommodation probably more like 110 miles. Proved that multi terrain walking including the odd uphill/downhill and the occasional stretch of bogland is a good variation on TOF (Time on Feet) training. Same rules apply though – you must have the right footwear !