Local councils will be given the power to limit “skyrocketing” rent increases in the private sector if Labour came to power.

Shadow chancellor John McDonnell said at Labour’s economic conference at the weekend that help was needed for people “at the mercy of an unforgiving, unrestrained housing market and landlords”.

Rent rises would be pegged to inflation, and the “local rent regulation” would be set locally, not nationally.

Meanwhile the new Labour mayor of London, Sadiq Khan, told the BBC that he does not favour rent controls in the capital.

However, in his bid to become Mayor, a manifesto commitment was to create a new form of affordable housing with rent based on a third of average local income.

Meanwhile in Wales, the Welsh Assembly has announced a new rent-to-own model, whereby monthly rental payments accrue the tenant a percentage stake in the property, owning it outright after 30 years.

In Manchester there could also be a rent-to-own housing model if Labour’s Andy Burnham succeeds in his bid to become mayor.

He would use a £300m pot of devolved cash to compulsorily buy up run-down housing which would be let out under a rent-to-own scheme.

Launching his campaign, Burnham said there were too many irresponsible landlords from outside the region “raking in money” from badly maintained privately rented homes.