Ok inspecting a little further... The headbadge isn't dark blue it is black (with a little gold).... The Bianchi is written in non itallics and is written on the down tube and seat tube...

The frame number is a total misnomer as I found another one stamped into the top front of the headtube and it is just a number with no letters (I guess the other number I found was an old and useless attempt at a UK security mark (postcode and house number) - It was so badly done it looked nothing like a postcode so sorry about that).

The headset is manufactured by ofmega...

The rear dropouts on 2nd inspection possiblly are pressed ones so it probs is a cheap low end frame (still puzzled as I though celeste was reserved for the better frames in the range), also the lack of mudgaurd provision and the lack of any extra room between tyre and crown points at a more serious race oriented bike. Will weigh it (with and without forks) as I still think it is a reasonable weight and quite a nice geometery so will probs build it up as a comfy winter hack....

Appreciate the help so far

John