Jeeeez! That was quite an experience to go through, Nigel, and I suspect you were pretty careful not to drive over any bumps, lest that shotgun went off accidentally...in any case, I'm sure the last thing you wanted going through your mind was a load of buckshot!
You were a lucky man...sometimes robbers will "neutralize" any witnesses

, not to mention the chance of being shot by the coppers if a shootout should occur.
Ian