EC4R: no postcode below a spring high tide, the lowest 0.8 m above it

EC4R on the relief of London, with a tide staff: Its lowest postcode is 0.8 m above a spring high tide.

No postcode in EC4R stands below an ordinary spring high tide at London Bridge. The lowest, EC4R 3AE, 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 5.6 m and 13 m, measured from Ordnance Datum; the middle one stands at 9.0 m.
4 of 56 stand lower than the 1953 tide (5.41 m).
9 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
Mostly in City of London; partly in Islington.

Open EC4R on the map