Flying free, NevB.. Thanks for the response and input

Flying free - There are no markings underneath, at all (unfortunately) so the hunt goes on. Thanks for the cheery response, I like it too, I just want to try and find out more!
NevB - Oddly enough, the piece you referred me to came in the same auction lot!, (Image of the lot attached, just the three black pieces, not the two green pieces, that's a different story!)
The Sowerby 1388 Tea Caddy in the image on the glass gallery could almost be the same piece as the one I bought - exact same date and batch number stamp!!
I have had a good look around and the only pattern I can find for the 'unknown' tea caddy that is similar is a poorly scanned image of a hand drawn Davidson piece, based purely on the 'ivy' detail, the tell tale lid with the branch/twig on top doesn't appear anywhere 
The hunt goes on.. this is what makes dabbling in pressed glass fun, researching some obscure piece (usually only to find out it's still be knocked out somewhere in a factory in Azerbaijan or somewhere!!)
Cheers,
Bob