Both are those are too.
Miniatures with labels were made in London for a Perth dealer. These were very nicely made. Fake labels were also added to them. The same dealer then had a lot of Monart look-alikes made by a Scottish maker who knew they were being misrepresented, actually delivered to the shop himself.
http://ysartglass.com/Ysart/Fake%20Ysart%20Glassware.htmThen there is simple mistaken identity
http://ysartglass.com/Ysart/NotYsart.htmAlso glass by Chic Young (Sold in PP shop), Deacons, Holmes has been misrepresented as Monart.
Some Vasart and Strathearn has been ground and polished c1990 to pass off as Monart. Some glass made in the Ysart style, not so long ago, but with unusual embellishments was sold through a Scottish auction house as a fictitious Vasart Studio range.
Familiarity with the glass of the Ysart family is all that is needed to recognise the fakes and misrepresented glass.
On top of that over the years there have a lot of Monart 'moulds' circulating, several sets of 'Paul Ysart tools' and a fair bit of fake documents, colour book, notepads etc. All of this has been traced back to one dealer, along with the fake PY weights. Rumours of the maker that circulate are mostly unfounded, there were actually several.