It does seem to be more frequent and is unsettling. We were caught up in September -- original flight cancelled for "technical reasons", later flight to which we were transferred 156 minutes (per BA) late due to "rotational engineering issues." We decided this time around to try a different routing with another carrier ---- and it definitely wasn't to the Orange alternative whose on time performance is famously bad and goes where we don't want to go. LCY is too important to the IOM to allow this sort of thing to creep in again.