DA17: 90 of 337 postcodes stand below a spring high tide

The ground at 90 of DA17's 337 postcodes (27%) 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 1.1 m and 53 m, measured from Ordnance Datum; the middle one stands at 35 m.
• 94 of 337 stand lower than the 1953 tide (5.41 m).
• 91 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• In Bexley.