G-WLLY crashed when the vertical fin detached in flight, sadly killing it's 2 occupants.
The AAIB report states :
"The aircraft was constructed in 1969 and had experienced
a chequered history, being involved in a number of
incidents and two major rebuilds. At some stage it had
gained a tail boom of uncertain provenance, which served
to highlight a potentially confusing situation with the
Maintenance Manual, in that the method used to attach
the vertical fin varied according to the serial number of
the airframe, as opposed to that of the tail boom."
It makes a worrying read.
Tarman