Google's Maps API now includes geocoding for UK addresses (and postcodes). This page makes use of this API, with the preferred country set to be the UK:
Try these:
- BN15 9SY (Fonant)
- 31 Greentrees Crescent, Lancing (Fonant)
- West Sussex
- Wiston
- Wiston, Sussex
Google knows where some famous places are too:
And it works for addresses around the world:
- 24, Rue de Sèvres, Paris (random address)
- Paris
- France
- Banana