Right done a **** load of cross-referencing-part numbers, models, pictures etc...
For future reference in case anybody owns a March on here with the newer style ABS brake drums I've found out that B13's, N15's and Sunny's share the same shoes except that they're 5mm thicker and they have an extra hole in the middle of the shoe.
There's that many contradictions with part numbers that it sends you down a rabbit hole and nowhere mentions that they're the same apart from some pn coinciding with one another.
Now I could be pissing in the wind here but Europarts have a 50% sale on so I'm picking up a set of Pagids for £14 tomorrow and I'll confirm if I stink of piss or roses...
I'm hoping it's the latter ...