I also owned LYX330K ~ I bought it around 1974 from the 'Chequered Flag', a specialist sports car dealer in Chiswick High Road, west London
The first owner / importer was Les Leston, the British racing driver.
After doing a deal for the car the salesman advised me that the magazine 'Motor Sport' had previously arranged to borrow the car for the weekend to do a feature & road test that indeed was published soon after. When I picked up the car the following week the original steering wheel had been broken so a replacement had to be found and fitted before I could drive it away.
However I drove, like a clergyman or a hooligan, I remember around 8MPG was returned.
I didn't keep it for very long, perhaps 18 months, and advertised it for sale in 'Exchange & Mart' A potential purchaser contacted me to arrange a viewing and we agreed to meet at the local underground station. Much to my surprise a striking tall blonde lady exited the station and within fifteen minutes the money changed hands and she drove off to the North Circular Road never to be seen or heard from again!
David R