Chalfont and Latimer, used to have one every half hour, (the Chesham shuttle), but now one a week on a Sunday night, comes down from Chesham in service then does a Rusty Rail move empty to Amersham.
If we are including LUL.
Jubilee Line Canons Park, trains on/off Stanmore Sidings
Central Line Ruislip Gardens, trains on/off West Ruislip