These are the stations at the edges of the London Transport system with their current Zone * Amersham Station Metropolitan Line 9 * Brentwood Station B * Broxbourne B * Bushey Station London Overground and London Midland 8 * Carpenders Park Station London Overground 7 * Chafford Hundred Station c2c G * Chalfont & Latimer Station Metropolitan Line and Chiltern Railways 8 * Chesham Station Metropolitan Line 9 * Cheshunt Station 8 * Chorleywood Station Metropolitan Line and Chiltern Railways 7 * Croxley Station Metropolitan line 7 * Grays Station c2c G * Purfleet Station c2c Thurrock G * Rickmansworth Station Metropolitan line and Chiltern Railways 7 * Moor Park Station Metropolitan line 6 & 7 * Ockendon Station c2c G * Shenfie