I like the picture, Maggi.
You may be right about the destructive capacity of the trenching / drain spade. But I think if Ian is really going to wreck his drive, without resorting to power tools or explosives, where there may be licensing issues, the Faithfull 6-foot Digging Bar, at around 17lbs, is probably the preferred implement.
Where do you stand on wavy spades? (yes, yes, I know there are the little bits for your feet ...)