Letting agents throughout Wales face the very real possibility of a ban on fees, together with the introduction of rent controls.

Both have been pledged by Plaid Cymru in its election manifesto for next month’s Welsh Assembly elections.

None of the other parties has yet published its manifesto.

The current make-up of the Welsh Assembly is: Labour (30 out of 60 MPs); Conservative (14); Plaid Cymru (11); Lib Dem (5). Because of the balance of power, with Labour holding half of the seats, it has close political ties with Plaid Cymru.

The lettings sector in Wales is already facing the challenge and costs of compulsory licensing.

Douglas Haig, the Residential Landlords Association director for Wales, said: “Plaid’s proposals for rental housing would take us back to the past.

“They are a one-way street to fewer and poorer quality homes for rent, with tenants facing higher, not lower, rents.

“There is a wealth of evidence from all around the world that all rent controls do is shrink the rented sector, making it more difficult and more expensive for tenants to find accommodation.”