Super-prime property in London, valued at £10m and above, continued its gravity-defying surge this month with values rising by nearly 3%, taking the annual rise so far to 19%.

Despite concerns of a "trickle-up" effect, which would see the super-prime prices being infected by the rest of the market, ϋber-expensive property is still bucking the trend which has drained 9.2% off the value of property this year, according to a report from London estate agent Knight Frank.