54 What seems to us to be critical is that the respondent assumed the responsibility, under its contract with CIS, of endeavouring "to get workers as close as possible to the work face" in order to enable them to do the re-cladding work and of ensuring that safety would be "paramount" in the type of system supplied. Moreover, it did so in circumstances in which, as we have said, it envisaged that workers had to reach the top of the aircraft and knew that this could not safely be done from the scaffolding. No other means of safe access to the top of the aircraft had been mentioned or offered to be provided by CIS. The respondent did not make relevant inquiries. Having regard to the responsibility it had assumed, it should have. In our view, the respondent ought to have known that there was no safe access to the top of the aircraft. In those circumstances, there was, in our opinion, a real risk, which was reasonably foreseeable by the respondent, that CIS' employees would injure themselves in attempting to access the top of the aircraft, including by misusing the scaffolding as a launch point for a dangerous leap across a substantial gap. In those circumstances, it seems to us, it was reasonable to require the respondent to have that risk in contemplation and to impose upon it an obligation to take steps to avoid it. Put differently, it seems to us that the respondent owed to those engaged upon the re-cladding work, including the appellant, a duty of care to ensure that a safe means of effecting that work, including work on the top of the aircraft, was provided.