When the flights are available online then LM is so easy, so long as you don't want to make changes / cancellations and have to use the call centres. I managed to get LHR-JNB and JNB-PER Business first time around, however LHR-PER business is proving really challenging, possibly because of the SIN-PER SQ lack of availability to LM members. As a backup, I booked LHR-PER through Krisflyer, hoping that something will come up on LM (cancellation through KrisFlyer is relatively cheap).
Any tips apart from the shreenshot method? (about to research various individual sectors).