Just tell him he was employed by the previouse owner until it closed down, the pub has now reopened under new management,
and you have been asked to do the job now, so its a big big No and you won't be handing it over, i dare say the new manager
wouldn't be very happy after giving the job to you he suddenly one day sees this other guy turn up out of the blue cleaning his
pubs windows.
Best regards
Lal