Ronnie,
Because I was focusing on your query on the source of the canes I forgot to add an important piece of information about the age of the item ...
Dishes like this one were also made at both Vasart Ltd and Strathearn Glass, and many have only earlier canes!
So, without a check under shortwave uv light, for a blue or a grey fluorescence we cannot say for sure whether an item was made at the Ysart Bothers works or later. The shortwave uv light will show if an item is before Vasart Ltd / Strathearn, but will not separate Vasart Ltd from Strathearn.
You may like to update your eBay listing (and your post in the Market Place) to say that the canes are Ysart Brothers or earlier but the dish may have been made later.