Well just to put this one to bed, it's all sorted and a lesson learned......good compression means nothing when it comes to burning oil.
After having the head off 3 times, replacing the stem seals twice, 1 head skim, new inlet gasket, sealing exhaust manifold studs that were leaking oil, carrying out 4 compression tests, dry, wet and cold, warm and getting even readings between 210psi and 220psi i pulled the bottom end apart and changed the rings and bearings.
Now i have a 100% smoke free non oil guzzling 1.6 ts that feels better than it ever has. Done 1500 miles and the oil is still bang on the max.
If you have an oil guzzler and know one end of a spanner from the other i would suggest spending the £200 on parts and devoting a weekend to rebuilding the engine as i have done, with the price of decent oil you will save yourself a fortune in the first 12 months !