Marc von Grundherr, director of estate agent Benham and Reeves said: “While mortgage affordability remains an issue, it certainly hasn’t dampened the appetite of London buyers and we’ve continued to see a high level of activity at all price thresholds, but particularly across the super-prime market. Buyers at the very top end of the ladder are acting with great confidence, with the higher cost of borrowing not presenting the same obstacle as the average homeowner.