Well EB, I c;early over estimated the level of cleverness on Tenths, so for the even less bright (No names mentioned here) I will explain.
Close examination of the six pictures in the original question will reveal that they have a
Racing Number the white Porsche carries number 1, the white single seater (goodness knows what it is) has number 2 on it's engine cover, the red car (A Lancia, by the way) is numbered 3, the funny black car is number 4 (It's a Clubmans) the little green sports car is number 5, and the ARV6 Morgan of Simon Orebi Gann approaching Druids Corner at Brands Hatch earlier this year has a number 6 on the door.
So the correct sequence is Porsche, odd white racing car, Lancia Saloon, black Clubmans car. Green car, Morgan.
The rather obscure 'clue' offered shows a variety of cars all carrying (in plain sight) a racing number 7 to 12. I apologise for causing so much mental anguish, and promise not to do it again. (Today)
