There are more than 450 luxury homes worth £1m or more in the county, with a combined value of almost a billion pounds, a banking firm has said.
Research commissioned by Investec Specialist Private Bank states the combined wealth of all 458 residential properties is about £950m with an average price of about £2.1m.
This includes 12 worth between £5-10m and four worth £10-15m.
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.