Bumped up to support the quest for info on the current thread concerning 8m, 10m and 11m tilts of the '60s.
Just to cross-reference for future researchers, there’s a lot of really useful Ackworth info on this thread:
viewtopic.php?f=35&t=168946&p=2761449#p2761449
Meanwhile, here’s a scan of a pamphlet (posted by TipTop on the other thread). It shows that Ackworth offered customers 8m, 10m and 11m tilts for cross-Channel work.
Cheers, Ro.