Zoopla's revealed the UK's most expensive postcodes, and it's topped - less than surprisingly - with W8, where average property prices are in excess of £1.5m. The most expensive street? Kensington Palace Gardens... at £18m a house, on average. Other £1m+ postcodes are SW7, SW3, W11 and SW10. Virginia Water, alone, represents the rest of the country in the top ten list.

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