London Underground

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Across
  1. 3. Furthest station away from Central London
  2. 4. Line that’s getting an upgrade by 2025
  3. 5. Closest station geographically to Heathrow Airport
  4. 7. Northern Airport in London
Down
  1. 1. Station after King’s Cross on the London HighSpeed railway (blue National rail line on TFL maps
  2. 2. Busy station on the Elizabeth and Jubilee lines
  3. 5. Station next to Tulse Hill on the Thameslink railway near Wimbledon Chase and South London
  4. 6. Fancy place accessible on the Chiltern Railway