SE18: 79 of 1,450 postcodes stand below a spring high tide

The ground at 79 of SE18's 1,450 postcodes (5%) 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 5.1 m and 67 m, measured from Ordnance Datum; the middle one stands at 28 m.
• 159 of 1,450 stand lower than the 1953 tide (5.41 m).
• 159 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• In Greenwich.