Thomas Webb or Stuart were the other two, but with that very large polished pontil mark my own first thought would be Stevens and Williams.
I could be way off but that would be my first port of call.
However, the only book that might shed light on this would be Charles Hajdamach's 20th Century British Glass and even then,no guarantee you will find it in there. And short of going to look at the pattern books at Dudley, it's unlikely you will get a definitive id unless you can find a Stevens and Williams shape match in another decor.
Sorry, Stevens and Williams is a pita to try and identify precisely unless you have access to the pattern books.
I hope you don't mind but could I ask a moderator to add 'Peacock eye trails & prunts & lilypads' to your header please. I've added it to my reply here because I can see them on your vase
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