That’s a wonderful photograph, MikeB1. I assume that the two gentlemen in it are your father and Fred Taylor. Which are which?
The caption to the photograph suggests that it was taken at Castle Bromwich Aerodrome in 1948. If so, presumably the Wagtail was flown in and, if so, your father and/or Fred Taylor were chancing their arms, bearing in mind that the Wagtail wasn’t registered, didn’t have a certificate of airworthiness, etc. – although apparently their solution to this problem was to describe all their flights as ‘tests’ which, they concluded, didn’t require adherence to the legal ‘niceties’!
Do you have any other photographs of the Wagtail or any of the other aeroplanes built by Fred Taylor and your father? If you do, I suspect that I’m not the only person who’d be delighted to see them.