BR7: 43 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in BR7, BR7 6HL, stands 43 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, BR7 5PN, stands 97 m above it.
- Ground at eight in ten of its postcodes: between 66 m and 98 m, measured from Ordnance Datum; the middle one stands at 83 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Bromley; partly in Greenwich.