UB4: 22 m clear of the highest tide in the London Bridge ledgers

UB4 on the relief of London, with a tide staff: 22 m above the 1953 tide, the highest in the ledgers.

The lowest postcode in UB4, UB4 0NL, stands 22 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, UB4 8PH, stands 47 m above it.

Ground at eight in ten of its postcodes: between 30 m and 41 m, measured from Ordnance Datum; the middle one stands at 32 m.
None lies in the Environment Agency's Flood Zone 3 from the sea.
In Hillingdon.

Open UB4 on the map