Cheers Sinnerman, the similarities between the Roberts and my Overburys are there I think geometry wise, I guess because they are both mid 90's (mine being around 96 so a bit later again).
The fork issue was bugging me so I fettled the headset to make sure everything was flush and fitted correctly and took a couple more pics. I also added some straight lines to check the fork legs relating to the head tube.
Again, to my eye it all lines up well, ignoring the yummy fillet brazing.
2nd opinions would be gratefully received,
Also a side on profile followed by a side on profile from the Roberts catalogue (thanks Sinnerman).
Note the distance between front tyre and down tube, and pedal to front tyre.
I checked a rough guide with a crank, spd, and shoe. I have to admit the shoe is closer to the tyre than anything I have ridden before, but no overlap