Letting agents have reported an increasing number of landlords selling their buy-to-let properties during March.

The latest ARLA Propertymark Private Rented Sector report showed an average of four landlords per branch had announced plans to sell up last month.

No reason is given for the decision but it does coincide with the rolling back of mortgage interest relief.

The last time the number of landlords selling their buy-to-let rose above three per branch was in November last year, when the fees ban was announced.

David Cox, chief executive of ARLA Propertymark, said this showed tenants were already being hit by the buy-to-let tax changes.

Tenants do appear to be getting more savvy, though, with 3.6% of agents reporting rent reductions, compared with 2.2% in February.

There were still increases with 25% reporting landlords had raised rents, down from 32% last year.

Meanwhile, the supply of rental stock remained flat at 183 since February, but was 8% higher since March 2016.

Members had 36 prospective tenants registered, up from 34 in February.

Cox said: “It’s concerning that, despite supply increasing over last year, stock failed to return to the market after dipping in February.

“When we also consider that this is coupled with a rise in the number of landlords selling their properties, this is bad news for those searching for a rental property.

“The introduction of mortgage interest relief means the market is becoming less and less attractive to investors and it appears some landlords are, as we predicted, choosing to exit the market rather than pay the higher taxes.

“What’s more, two thirds of our members are concerned the Government will introduce even more landlord taxes in 2017, which will only further dampen supply.

“Following the announcement of the ban on letting agent fees, we expect the situation to only get worse for tenants when inevitably the costs are passed on to tenants through higher rents.

“However, it’s positive that more tenants are taking action and negotiating rent reductions before the consultation ends and they see their rents increase.”