"In my judgment there is no doubt that there has been a long-standing assumption that dual vicarious liability is not possible, and in such a situation it is necessary to pause carefully to consider the weight of that tradition. However, in truth the issue has never been properly considered. There appears to be a number of possible strands to the assumption. Two are mentioned by Littledale J [in Lather v Pointer [1826] 5B & C 547] : the formal principle that a servant cannot have two masters; and the policy against multiplicity of actions. As for the first, even if it be granted that an employee cannot have contracts of employment with two separate employers at the same time and for the same period and purposes – and yet it seems plain that a person can (a) have two jobs with separate employers at the same time, provided they are compatible with one another; or (b) be employed by a consortium of several employers acting jointly – nevertheless that does not prevent the employee of a general employer being lent to a temporary employer. As was so clearly exposed in Denham [Denham v Midland Employers Mutual Assurance Ltd[1955] 2QB437 (CA)] , it is an inaccurate metaphor to say that the employment or the employee has been transferred: it is rather that the services of the employee have been lent or hired out, or borrowed or bought in, in circumstances where the temporary employee becomes responsible, under the doctrine of vicarious liability (respondeat superior) for the employee's negligence, and does so even though the formal contract or relationship of employment has not been transferred. That demonstrates that the doctrine of vicarious liability may properly be invoked against an employer who is not really, in law, the employee's employer; and that the use of the expression "transfer" is potentially misleading."