I had to read this thread again because I found the same model, but really Andrew, I didn't realise your vase was this big!
Just to show, I found this vase non id'd, and I thought that, even though i don't buy opaline glass, I couldn't ignore a vase from 1865 for £20. Just received it and my initial thought was that it's just a jade green vase ... but I wondered ... and the surprise you get with a UV lamp! I've never had a piece like this so I didn't know what to expect!