E3: 2 of 1,174 postcodes stand below a spring high tide

The ground at 2 of E3's 1,174 postcodes (under 1%) 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 6.7 m and 13 m, measured from Ordnance Datum; the middle one stands at 10 m.
• 33 of 1,174 stand lower than the 1953 tide (5.41 m).
• 31 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Tower Hamlets; partly in Newham.