N20: 45 m clear of the highest tide in the London Bridge ledgers

N20 on the relief of London, with a tide staff: 45 m above the 1953 tide, the highest in the ledgers.

The lowest postcode in N20, N20 0AT, stands 45 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, N20 8LZ, stands 120 m above it.

Ground at eight in ten of its postcodes: between 69 m and 97 m, measured from Ordnance Datum; the middle one stands at 90 m.
None lies in the Environment Agency's Flood Zone 3 from the sea.
In Barnet.

Open N20 on the map