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HICO-P: Thanks for bringing me up to speed on the Mackenzie Hill history, appreciated and - my apologies for excluding you in my mentionings. I would in fact be keen to learn more about your time with them and have PM'd you accordingly.
I sent this image (a while back) to
Speechless Two and which I am sure you already have as it is in the public domain:
Mackenzie Hill's MBB Bo105D at Kindlington, May 1975. The records show that by this time the aircraft was already under the ownership of Wimpey Labs (a Ferranti managed contract). Ferranti bought the aircraft outright in June of '77.
S.