With my walks, I like to have one set and ready to go (in my own case the last 40 miles of the Wolds Way over two days on the coming bank holiday), and one festering.
I'm thinking of a 20 mile hike over the Flamborough headland, from good ole Brid to Filey, but it's a little awkward for public transport. Am doing it with a pal who can drive, and so will probably just park the car in Brid and catch a bus back, all depends really. I like cliff walking, some really nice views, though I've not managed to catch of the "sea fog" that Summitzero referred to elsewhere.