(01 Dec 2020, 8:58 pm)Storx wrote Just had a look through to see if I could find them but couldn't seem to find anything, just one link which has sadly died.
It was possibly in relation to the purple solar's used on the 20.
They endured on that route for far longer than they should have done.
Hammered day in/day out and well past their best when they got the upgrade.
I seem to remember a number of them going missing, with gaps in service and spares frequently appearing for a period. In fact #missingpurplesolar or #purplesolar may help you in your search.
Despite all of the positive PR at the time about air quality, the on-board environment was far from pleasant or comfortable.
A bizarre period, which I hope isn't repeated.