It seems that the recent price development is due to higher taxes on second homes (and expensive purchases) which deter capital investors. This could be a good

It seems that the recent price development is due to higher taxes on second homes (and expensive purchases) which deter capital investors. This could be a good thing as it means that a higher share of houses will be owned by people living only in London, instead of second homes. And even though it only directly effects the most expensive property, it ultimately lowers prices for a lot of houses due to the inelastic nature of housing demand.