It's definitely IoWSG, you have a bit of "Buttercups and Daisies" "Wild Garden".
I have the 2007 Collections catalogue in my sticky mitts and it's in there, described as a lipped vase, the small one, WG7 (9.5cm diameter) retailed at £92.60.
Your's looks bigger than that! The 13.5 cm one was £117.25, the 18cm one, £219.70.