IG1: no postcode below a spring high tide, the lowest 0.8 m above it

IG1 on the relief of London, with a tide staff: Its lowest postcode is 0.8 m above a spring high tide.

No postcode in IG1 stands below an ordinary spring high tide at London Bridge. The lowest, IG1 3FA, is 0.8 m above it and 0.6 m below the tide of 1 February 1953.

Ground at eight in ten of its postcodes: between 7.7 m and 16 m, measured from Ordnance Datum; the middle one stands at 12 m.
2 of 911 stand lower than the 1953 tide (5.41 m).
7 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
In Redbridge.

Open IG1 on the map