On to Old Trafford - yes, really - for the 1970 FA Cup final replay and Chelsea and Leeds are about to produce another game for the ages, one of the most enduring cup finals of all time, while simultaneously doubling as a useful handbook on guerilla warfare. Steven Scragg and Dave Bowler take you through the game and do work of vital national importance by concluding how we can return the Elgin Marbles, yet still be a country with a greater cultural bank balance.