Victorian air trap pink satin glass vase - "Pompeian Swirl" type

This is a fine example of Victorian satin glass that I was pleased to add to my collection.
It is made from three layers of cased glass - clear over a spreading pink, with a white interior.
The air trap pattern is a swirling stripe, in the style of "Pompeian Swirl" made by Stevens & Williams. I do not know for sure that this is an example of theirs, but the style is definitely similar.
The vase measures around 13.3 cm tall, 6 cm across the flared, flat top rim, & 6 cm across the base, which has a snapped pontil mark.
Last photo shows it with another example of the same pattern, in the identical shape.
I have another piece of this swirl pattern, in a dark pink, but a slightly squatter shape.
This type of glass was made by various manufacturers in England, Europe, & the USA, so unless a pattern is well - documented, making a firm attribution can be difficult.
There's something about the rather restrained style of these that suggests an English origin to me, however.