I can shed some light on the Gem problem. It seems most likely that the probable cause for the tragic loss of Richmonds Lynx was an uncontained free turbine failure, resulting from an internal oil leak and subsequent fire. It appears likely that the second engine was hit by debris from the failed engine, so causing a further fire and peripheral damage leading to the loss of that engine as well. None of this is absolutely definite, as the nature of the damage made the investigation challenging for RR, I believe.
I understand that the boffins have now identified the most probable cause and the inspection regime is to identify all suspect engines and then pull them out for a fix. Unfortunately it'll take some time to inspect and then fix all affected engines in the fleet, so flying will be restricted for a few weeks yet.