SE14: 149 of 419 postcodes stand below a spring high tide

The ground at 149 of SE14's 419 postcodes (36%) 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 2.8 m and 23 m, measured from Ordnance Datum; the middle one stands at 5.3 m.
• 214 of 419 stand lower than the 1953 tide (5.41 m).
• 149 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Lewisham; partly in Southwark.