House prices fell at their Fastest Pace for six months in April as a temporary boost from a tax holiday and unseasonally warm weather in March faded, a survey showed on Tuesday.

The Royal Institution of Chartered Surveyors' (RICS) seasonally adjusted house price balance fell to -19 from a slightly downwardly revised -11 in March, substantially undershooting economists' forecasts for a -10 reading.

London was again the only part of the country where house prices rose, albeit at the slowest rate since mid-2011.

And for the first time since September, home sales declined.

House prices had earlier been supported by an exemption for first-time buyers from a transaction tax on homes worth less than 250,000 pounds which expired in late March, as well as by unusually warm weather which boosted viewings.

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