UK RHD Small window standard 'eh?
VERY rare. Under five remaining I think?
As far as washers go it wouldn't have had them from new, but some did have them as a dealer accessory.
You do need some form of washing the windscreen on the move however for a UK MOT.
I've heard of lots of people getting by and passing with just a Fairy liquid bottle with
'Washers' written on the side, full of water and left on the passenger seat.
Be sure to go to a 'classic' friendly garage and I'm sure you'll get a pass, with no cutting or drilling. 🙂