If you're talking about the scenario originally published in Dragon #100 I'd be astonished. It was a real stinker. Awful, unplayable, badly plotted, and obviously written by an american who had never been to London.
I suppose transferring it to New York would have got rid of some of the more ridiculous elements. That plus a decent GM to re-write much of the plot.
It's interesting how peoples can have such differing opinions on the same scenario.
My recollection was that the author hadn't bothered to do any research at all. Horrifying as TSR had a UK office in those days. The currency was wrong, we were informed that the UK had gone decimal (correct) and that that there were now ten pennies to the shilling and ten shillings to the pound (nonsense).
London was peopled by 'Peter Pan/Oliver Twist' street urchins, 'Mary Poppins' nannies and (contrary to what another poster says) armed policemen, or at least policement with ready access to guns. A friend of mine was in the Metropolitan Police at the time, he'd never seen a gun, and the gun cabinet key was kept locked in the safe.
The author was also amused by the fact that in the playtest one of the characters had tried to drive a car, but had got in the wrong side (as we Brits drive on the left) !!!!
Awful