I guess you mean these Andy? I'm sure they will fit ...
https://www.royalenfieldshop.co.uk/product/royal-enfield-military-panniers-black
They’re the ones. I was expecting them just to be waxed canvas and not really good for anything other than a pair of over trousers and a box of sandwiches but they’re actually pretty well made, come with carry straps and drop on and off very easily. I’d be more inclined to use them than either the Kriega or Wolfman throw overs I’ve got for other bikes.
Cheap as well which is a bonus