British landlords are set to sell off their rental properties at triple the pace of two years ago after a jump in mortgage costs and tighter rules on letting made the business less profitable, a leading tax consultant said.

About 15% of rental property owners are likely to leave the rental market this year because of the pressures, according to a survey of 2,081 landlords and tenants conducted in July by the advisory firm Cornerstone Tax. That’s about three times the pace recorded two years ago, said David Hannah, group chair of Cornerstone, which is based in Leicester in central England.