Update is that the gearbox is still flaring from 1st to 2nd Had the crankshaft position sensor replaced & car runs so sweetly, battery ok ,but hesitant changes just the same.
I have had 3 different places drive & diagnose & most reputable one says terminal wear of a primary clutch other general wear for mileage & age best go full replacement & torque converter £1600, they are v.good & trustworthy all the main agents & trade use them.
Other opinion similar but £1200+ for repair kit to clutches & components £1200+
3rd opinion normal wear just live with it till it becomes difficult then deal with it.
Still waiting for a miracle but looks like its try ATF & filter change plus additive & live with it. I would favour the £1600 route but that kind of money in a car that is devaluing to death daily is not a sensible option for me.
Any developments will post back, good luck with the rest.
BTW if anyone wants to know the auto transmission outfit is in Barnsley,S.Yorks, Martin Lowe & they are 100% on the case & very accommodating, deal with all makes & really do come highly recommended