EC4M: no postcode below a spring high tide, the lowest 1.2 m above it

EC4M on the relief of London, with a tide staff: Its lowest postcode is 1.2 m above a spring high tide.

No postcode in EC4M stands below an ordinary spring high tide at London Bridge. The lowest, EC4M 7AX, is 1.2 m above it and 0.2 m below the tide of 1 February 1953.

Ground at eight in ten of its postcodes: between 10 m and 17 m, measured from Ordnance Datum; the middle one stands at 15 m.
One of 93 stands lower than the 1953 tide (5.41 m).
None lies in the Environment Agency's Flood Zone 3 from the sea.
Mostly in City of London; partly in Islington.

Open EC4M on the map