What Air Ministry purge of log books?
"In 1959 the Particular Instance Paper Committee recommended the destruction, save for a few specimens, of log books remaining unclaimed in the Air Ministry despite announcements in the Press. Further announcements were then made through the Press and BBC stating that books not claimed by 15 September 1960 would be destroyed. Of the 6,400 shelf footage of log books, 20 feet were selected for preservation, aiming to illustrate: format of log books, types of flying training at home and abroad, aircrew trades, flying experience, operational flying experience, theatres of war, campaigns and operations. Also selected were: log books of distinguished pilots or members of distinguished squadrons, especially those detailing engagements with the enemy; of pilots with exceptional flying experience; and of foreign nationals flying with the RAF."
To describe this as a purge is disingenuous at best.
Many log books were claimed and remained in family hands. There is something of a trade in them today. Though the decision was taken before the RAF museum was founded it retains a selection of log books.
I have all my father's log books.