We got the local boys in to sort out our leaking air con unit and the chap spent an hour and a half giving the machine a thorough going over. As he left, we got a message from out landlady advising she had booked the engineers to arrive the next day.
Done was done and so we now have the best serviced air con units imaginable. The guys showed up bang on time, spent well over two and a half hours working without a break and with some luck, that should be the end to our repeat leaks.
We shall see.