John, I'll pm about pics later, just in case it will help!
Going back to the grounded Memorial Flight, appears during routine inspection some metal debris was found in the oil of one engine. So until the source is identified, the other planes are not flying. All makes perfect sense to me, and no different to modern plane safety requirements.
As usual the Beeb are talking a load of ******** about it on the JV prog. Makes me very cross so switched off!