—The condition of the house or of any of the common parts has deteriorated owing to acts of waste by, or the neglect or default of, the tenant (or any one of joint tenants) or any person residing or lodging with him or any sub-tenant of his; and in the case of acts of waste by, or the neglect or default of, a person lodging with a tenant or by a sub-tenant of his, the tenant has not, before the making of the order in question, taken such steps as he ought reasonably to have taken for the removal of the lodger or sub-tenant.

In this paragraph, “the common parts” means any part of a building containing the house and any other premises which the tenant is entitled under the terms of the tenancy to use in common with the occupiers of other houses.