Found a photo of the Austin 7, with Mac's [ my father ] dog Kim, Ed Dowding and a friend, name unsure. photo from my Dads ones so think he probably took it, some sort of a gathering as other cars in view including a Morris 8. have sent a copy to Ed, he may recognise the friend.
Photo would be around 1937-38. no concern about same tyres on each axle, looks like 3 different tyres in the view.