KT1: no postcode below a spring high tide, the lowest 0.7 m above it

KT1 on the relief of London, with a tide staff: Its lowest postcode is 0.7 m above a spring high tide.

No postcode in KT1 stands below an ordinary spring high tide at London Bridge. The lowest, KT1 1PX, is 0.7 m above it and 0.7 m below the tide of 1 February 1953.

Ground at eight in ten of its postcodes: between 7.3 m and 15 m, measured from Ordnance Datum; the middle one stands at 9.7 m.
One of 685 stands lower than the 1953 tide (5.41 m).
19 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
Mostly in Kingston upon Thames; partly in Richmond upon Thames.

Open KT1 on the map