Fackin oops.
My goal was not to buy any more cars but with the Lanchester out of action while we work through it and make it safe to use, and the Princess out of action and needing the engine to be removed (a job I am procrastinating about, and when I'm motivated am thwarted by schedule and weather conflicts) it was getting more obvious that I needed some personal transport. Something basic and reliable that I know my way around, that's going to be cheap to buy and run. This is an ideal candidate, on paper.
Whether I really can just use it as An Car or will end up getting all finicky about making it nice remains to be seen. I just want some hasslefree pootling for a few months and normally Maestros are just that.