DA8: 47 of 655 postcodes stand below a spring high tide

The ground at 47 of DA8's 655 postcodes (7%) 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 4.6 m and 49 m, measured from Ordnance Datum; the middle one stands at 13 m.
• 94 of 655 stand lower than the 1953 tide (5.41 m).
• 107 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• In Bexley.