Chancellor George Osborne has been told in no uncertain terms not to blame any decision to leave the EU for damaging the housing market.

London agent Maskells has told Osborne that the market is already damaged, and that he is the cause because of hikes to Stamp Duty on more expensive homes.

Its data shows that sales in central and south-west London have slumped badly.

Maskells analysed volumes over the last two years in 104 postcodes.

In the price brand £250,000 to £925,000, sales are down 47.8%. In the band between £925,000 and £1.5m, sales have dropped 7.8%. And in sales over £1.5m, there has been a drop of 58.2%.

Out of the 104 postcodes, volumes had risen in only two between the first quarter of 2014 to the same period this year.

Maskells also found that average prices had fallen in all three brackets, down 12%, 14% and, at the top end, by 35% respectively between the last quarter of 2014 and the first quarter of this year.

Although 46% of house prices in the 104 postcodes had risen, 54% had gone down. The most house price rises were in the lowest band under £925,000.

Maskells says that both house price falls and drops in transactions show the effect of the increase in Stamp Duty Land Tax announced in late 2014. At £925,001, the rate jumps from 2% to 5%.

While Osborne has warned that a Brexit could hit house prices, Charles Curran, principal at Maskells, said: “The market has been fundamentally changed as a result of the Chancellor’s actions over the past 24 months and his blaming further housing market turmoil on a Brexit is just a further poke in the eye to the market.”