E12: 50 of 396 postcodes stand below a spring high tide

The ground at 50 of E12's 396 postcodes (13%) 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 3.6 m and 14 m, measured from Ordnance Datum; the middle one stands at 9.3 m.
• 76 of 396 stand lower than the 1953 tide (5.41 m).
• 72 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Newham; partly in Redbridge.