A blunt capping of rents could hurt and not help tenants, Shelter has warned.

The organisation does however want control over rent rises alongside longer tenancies.

In a report commissioned by the organisation, University of Cambridge researchers said that “hard” rent controls would remove landlords’ financial incentive to invest in the sector, leading to fewer homes and less choice.

A survey carried out for the report found 31% of landlords would sell all or some of their portfolios immediately if rent controls were imposed.

The report expresses concern that if nothing is done, rents across England will increase by 22% over the next ten years, from £176 to £215 a week.

It also predicts a large rise in the rental population, up from 4.5m last year to over 7m by 2025.

It proposes that there should be five-year tenancies with rent rises limited to inflation. Shelter’s report says this would be acceptable to many landlords, just as long as they were able to take back the property to sell or live in.

Shelter chief executive Campbell Robb said that rent caps “could add fuel to the fire by pushing landlords out of the market and making it even harder for renters to find a home they can afford”.