Originally Posted by Al R
I wouldn't know how long the Lancaster for instance, will stay flying
From dimming memory cells, IIRC, after '474 was resparred by BAe some years ago, she was effectively lifed for another 50+ years, and according to BBMF at the time, the most likely scenario for determining how long they will be able to continue flying would be dependent on the availability of 100LL.
Which is just now starting to become an issue as the regulators are now beinging to look to removing the need for it for GA stuff on enviromental grounds.