SW1V: 212 of 572 postcodes stand below a spring high tide

The ground at 212 of SW1V's 572 postcodes (37%) 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 3.2 m and 5.2 m, measured from Ordnance Datum; the middle one stands at 4.3 m.
• 539 of 572 stand lower than the 1953 tide (5.41 m).
• 571 lie in the Environment Agency's Flood Zone 3 from the sea, mapped without defences.
• Mostly in Westminster; partly in Wandsworth.