SE8: 218 of 582 postcodes stand below a spring high tide

The ground at 218 of SE8's 582 postcodes (37%) is lower than an ordinary spring high tide at London Bridge (3.9 m above Ordnance Datum).

• Ground at eight in ten of its postcodes: between 2.0 m and 6.7 m, measured from Ordnance Datum; the middle one stands at 4.6 m.
• 399 of 582 stand lower than the 1953 tide (5.41 m).
• 366 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Lewisham; partly in Greenwich.