Tenants who have been allocated houses fairly, in accordance with the allocation policies of their social landlords, will find themselves underoccupying their homes.The National Housing Federation estimates that, across the UK, 670,000 tenants in the rented sector will be affected immediately and that the figure will rise to 750,000 when the pension credit age rises in 2020. Seventy-eight per cent of those tenants will be considered to have one bedroom too many and will lose an average of £12 a week.