Update
Well I removed the aluminium lug from the stays. The smaller seat stay was set fast ans refused to budge , so I applied the use of a blow torch to aid in its certain demise.
A minute or so of wafting the flame around the lug and a few wisps of smoke came out the holes in the rear of the lug. Then used gentle presuaion ) club hammer ) to drift the lug off the stays.
Cleaned out all the ols glue from the lug and off the ends of the stays.Its a prettty floppy cock fit and way too much movement . Im surprised the tolerances are not tighter.
Bought loctite 9466 as we had the gun at work already , £20 deliveered from Bearingboys.
Glued it last night , used the rear wheel in the drops to square it all up and a ratchet strap around the rear wheel and seat post to pull the rear wheel bob square to the frame , some heath robinson gap measuring confirmed its within 1mm of equidisnt from all of the stays.
As per usual there was one tiny problem , one part of the adhesive was coming out the rear of the gun as I pulled the trigger to force it down the mixing helix tube . I now do not know if the hardener was also coming out the front at the same time. I guess all will be revealed later on today when I drop the strop and give the wheel a good hard tug