Intereesting but sad story....
When l was a kid in the UK, my Dad had a 54 Turner Yeoman. Was used by local coal merchant to make deliveries to local houses. My Dad bought it for 50GBP and it sat for years in our shed. It would come out from time to time, was always a pig to start and the clutch plate would stick to the flywheel.
By the time my legs could reach the pedals l was itching to get a steer of the big girl. They have a great sound.
By time l was in my teens, we were taking it to a few rallies in UK.
In UK, everything got its coolant drained for winter hibernation. I was enthusiastic and did the job, draining down the rad. Confirmed to Dad that it was done.
Months later and the time came to dust her down, OMG... Both heads were split! Not just a little crack, the frost had caused the whole side to push out. Dad wasn't pleased but l was even less happy, he had promised the old girl to me as a kid and l hadn't taken the right care of her.
She got parked to the back of the shed and was forgotten. They aren't popular in UK and spares are rare.
Many years later he had pulled the heads off and had them professionally repaired. He never got them put together though and the tractor that had huge sentimental value to me was sold (almost given away...

)to a local fella that kept pestering Dad. I've no idea where she is now, 30yrs have passed since and we left there nearly 20yr ago....
One day !
The engine was used in marine applications. It was launched in about 1952 and was a very expensive tractor with only about 45hp. A field Marshall was a much cheaper machine l believe with similar hp.
The Turner suffered a very weak backend, very few that were worked hard survived and the introduction to the market of better hp competitors for less money saw its demise.