Activists say they are planning protests outside lettings agency offices this weekend.
Activists in the London Renters Union and Greater Manchester Tenants Union say they will stage the protests on Saturday to demand an immediate freeze on private rents.
The London activists claim some of their group have faced an average rent increase of £3,378 per year – which it says it 20.5 per cent – with many facing rent increases “upwards of 50 per cent.”