My contract states my houses permitted number is 7 but according to bedroom tax rules its OK for 8 people depending on age, relationship etc.
This is tosh - a landlord trying to hold on to their power to determine the number of bedrooms in a house. That decision is taken ONLY by the local authority, not by a landlord with a vested interest. And if landlords have been overcharging for rooms which were legally too small to be classed as bedrooms, they can pay the money back. To repeat, the statutory authority here is the local council that pays the benefit, not the landlord.
Dear Anonymous. I think you might be missing the point. IF the tenancy agreement says you have 3 beds, you have three beds, if it says 2 then you have 2. Thats the key. THE TENANCY AGREEMENT.