Eddie51
As MallyJ, has mentioned mentioned I also knew of a similar family who lived in a 3 bedroom Council House. The father was the original tenant, on his demise the tenancy passed to his wife, as agreed with the tenancy agreement. Their daughter who lived with them was refused tenancy of that house on the demise of her mother, as tenancy could only be passed on once. However the Council were obliged to re-house the daughter in an appropriate accommodation after the demise of her mother. In this instance as she was single and did not have children, that accommodation was a 1 bedroom flat. 5 years later, plus a few years she now has the possibility to buy the flat on the "Right to Buy" scheme. The discount is clearly defined on the "RTB" and will give her the foot onto the housing ladder. I think after 5 years the discount is 50% then 2% for each subsequent year.
I realise that it is not where your son would like to start on the property ladder, but at least it is a start.