I've gotten some great information from over the past few days on different forums but am no wiser to the provenance of the bike. Its not the end of the world (It is what it is) but it would be nice to know. What we know or can presume based on the general consensus of comments (Open to debate here):
* The bike is an SBDU from 1987.
* It does not have a SBDU decal or a 753 decal.
* Forks have been replaced at some time.
* It seems to be the second bike of a "PJ"
* PJ was no giant but good enough to have 2 bikes.
* The bike is more likely to be 753 if it was from a professional team but not necessarily.
(Weighing it will tell the truth)
* There was no obvious PJ on the Raleigh Panasonic team around that time. (Peter
J Winnen apparently rode a 56" & photos from the time support this)
So was it a sponsored amateur rider ?... Well according to Hillary Stone on a post of the provenance of a TT bike a while back:
http://www.retrobike.co.uk/forum/viewtopic.php?f=12&t=305897&hilit=raleigh+beryl&start=30
"
After Mike left the SBDU in 1982 there were lots of changes – frames for amateur riders were no longer given their initials and date – ........
There is a clear distinction between amateur riders and pro riders in my opinion. But where it is blurry seems to be with sposored amateur riders.......
I have had several frames from Raleigh pro and sponsored amateur riders in the 1990s – some have had the initials stamped on the frame as well as an SBDU number – more one of these frames was built from 853 so that dates the continued use of SB numbers until after 1995! Some have the rider's name and some not......
So could it be possible & this is only a thought; that the bike could have belonged to another professional team & was resprayed at some stage afterwards in the natty Panasonic colours? What other professional teams were out there at the time?
This could be completely off the wall but what do I know

Any opinions or mild abuse would be welcomed
Thanks again Shane.