Just for completeness, I decided to buy this cinnamon coloured one... (I hope you were not bidding m?) and all the bark effect matches the Ravenhead vase I have in its own box, so I feel very happy that this is Ravenhead Glass.
I believe that Ravenhead also made a few pieces in a mid blue and pale pink...as and when I find them, I will photograph and list them here for reference.
Just as an aside, I did see a bright orange one for sale on eBay and bought it with great excitement!... it turned up, well packed, but it had been PAINTED orange!
The seller was very good and did refund in full including the return postage!!