DA18: 67 of 68 postcodes stand below a spring high tide

The ground at 67 of DA18's 68 postcodes (99%) 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 0.9 m and 1.3 m, measured from Ordnance Datum; the middle one stands at 1.0 m.
• 67 of 68 stand lower than the 1953 tide (5.41 m).
• 67 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• In Bexley.