UB2: 13 m clear of the highest tide in the London Bridge ledgers

The lowest postcode in UB2, UB2 4GD, stands 13 m above the highest tide in the London Bridge ledgers (5.41 m, 1 February 1953). The highest, UB2 5LE, stands 27 m above it.
- Ground at eight in ten of its postcodes: between 26 m and 31 m, measured from Ordnance Datum; the middle one stands at 30 m.
- None lies in the Environment Agency's Flood Zone 3 from the sea.
- Mostly in Ealing; partly in Hounslow.