Section 3: Name the place 1. 3 platform on the Piccadilly with sidings 2. Junction between Turnham Green and Gunnersbury 3. Viaduct just north of South Harrow 4. Favourite place for District exploring 5. Circle Line trains can stable here
Section 4: Get the zones 1. Hatton Cross 2. Vauxhall 3. Stockwell 4. Morden 5. Golders Green 6. Wimbledon 7. Richmond 8. Chesham 9. Chalfont & Latimer 10. Marble Arch
2.27 is North Weald on the Central Line. All distances (apart from W&C) are measured using the Ongar distance system. Ongar being 0. The transfer points are where lines interchange, but not necessarily at physical connections (for instance, between District and Central is at Mile End).