“(1) If the clause contains language which expressly exempts the person in whose favour it is made (hereafter called ‘the proferens') from the consequences of the negligence of his own servants, effect must be given to that provision … (2) If there is no express reference to negligence, the court must consider whether the words used are wide enough, in their ordinary meaning, to cover negligence on the part of the servants of the proferens. If a doubt arises at this point, it must be resolved against the proferens … (3) If the words used are wide enough for the above purpose, the court must then consider whether ‘the head of damage may be based on some ground other than that of negligence' … The ‘other ground' must not be so fanciful or remote that the proferens cannot be supposed to have desired protection against it; but subject to this qualification … the existence of a possible head of damage other than that of negligence is fatal to the proferens even if the words used are prima facie wide enough to cover negligence on the part of his servants.”
“In seeking to apply Lord Morton's third test, we should not ask now whether there is or might be a technical alternative head of legal liability which the relevant exemption clause might cover and, if there is, immediately construe the clause as inapplicable to negligence. We should look at the facts and realities of the situation as they did or must be deemed to have presented themselves to the contracting parties at the time the contract was made, and ask to what potential liabilities the one to the other did the parties apply their minds, or must they be deemed to have done so.” …”