UB10: 26 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in UB10, UB10 0TF, stands 26 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, UB10 8AQ, stands 63 m above it.
- Ground at eight in ten of its postcodes: between 36 m and 56 m, measured from Ordnance Datum; the middle one stands at 42 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- In Hillingdon.