Where a contract expressly prohibits subcontracting without prior written approval, the contractor's performance obligation is personal and cleaning services performed by unauthorised subcontractors do not constitute performance earning the contract price, even where the services were in fact provided.
The full text is available to signed-in members, including the 23 later cases that cite this judgment.
2 of the 23 citing cases carry a classified treatment. How each court treated it is available to signed-in members.