Two identical jobs with air loss on Jaguar and also an Audi A3

We were called to a customer in Balsham who had a slow puncture on their Audi A3 so we took a Continental tyre with us but found that the possible cause was corrosion on the rim so we cleaned the rim and applied bead sealer so hopefully problem has been solved.Exact same issue on a Jaguar S type in Dullingham so same procedure was followed.