SE15: 388 of 1,195 postcodes stand below a spring high tide

The ground at 388 of SE15's 1,195 postcodes (32%) 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 2.6 m and 23 m, measured from Ordnance Datum; the middle one stands at 6.0 m.
• 544 of 1,195 stand lower than the 1953 tide (5.41 m).
• 321 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Southwark; partly in Lewisham.