The East Coast Main Line runs 393 miles from London King's Cross to Edinburgh and has served as one of Britain's primary high-speed rail arteries since electrification began in the 1980s. This add-on covers the 76-mile southern section from King's Cross to Peterborough, passing through Finsbury Park, Welwyn Garden City, and Hitchin, with landmarks including Alexandra Palace, the Emirates Stadium, and Digswell Viaduct.