Success, or at least partial success.
The piece turns out to be a Christmas Gift commissioned by Imag[in]e Nestlé who are Nestlé's Corporate Identity & Design team in Vevey, Switzerland. This glass piece was made in Amber (as the one I have) and Cranberry (see pic below) as the gift for 1998.
http://www.imaginenestle.com/index.php?/brochures-books/christmas-gifts-overview-since-1990/Rose was on the right lines with her link to the Red Glass Plate produced by Baldwin Guggisberg which was actually the Christmas Gift for 1996.
Imag[in]e quote "Human Resources" as their client for this piece, but no other information is given as to who it was given to or what purpose it served, although several other pieces were used as very fancy chocolate holders. It doesn't say how many of these were produced, but the Baldwin Guggisberg website said they made 18,000 of the red plates - this was however a more industrially produced piece and not hand blown / signed as with this item.
I was confused as to which was the top and bottom of this piece, but the Nestlé images shows it both ways so it was obviously designed to have a dual use.
There is no information regarding the studio that produced this piece of glass and so I will email Imag[in]e Nestlé to see if I can find out more (quantities / designer - maker) - if successful I will update this post with the details. Until then, if anyone recognises the signature from the piece then I would love to have that information.
I'm happy to have found this, but sad as I think I prefer the cranberry version.... always greener........
Thanks again for the input I received,
Mike
[Mod: Image from imaginestle website removed as per Board guidelines on copyright photos. Please simply follow the link above.]