Ramble: 3508  Meet: Hampstead station, NW3 1QG 11.40  Distance: 6.5 miles (2.8 miles in the morning)  Lunch:  The Old Bull and Bush Inn, N End Way London, NW3 7HE (GR TQ260869) 13.00.  Travel:  Northern Line Edgware branch, 11.10 (for example) from …