Ok so have done the clearances.....
And managed to get the chain and cams spot on again..
Here is what i did
Found TDC
Held Exhaust Side of Timing chain taught ( not silly but firmly )
Located Exhaust Cam and varied the sprocket mating position to chain until there was as good alignment as possible with the caps ( was not 100% )
Located Intake Cam and aligned as best as possible
Secured Caps with Bolts, ensuring to be aware of tightening on to Opened Valves before Closed and following a criss cross pattern
Used a Socket on the Flywheel to turn it clockwise a little whilst making sure chain does not jump off the Exhaust Sprocket, this took up any slack in between the sprockets
Installed the tensioner taking up slack in the intake side of the chain
Installed the top side chain guide/guard ( required 4 center bolts losening but no issues there )
Took opportunity to check the Cylinder Head Bolt torque before i put cams in as well as i have put the head back on
I have done this twice now and its worked fine each time - past week i have been using all sorts of methods and too focused on lining them up perfect not taking into account the effect of the slack and the effect of cranking clockwise slightly to take it up and move it to the Intake side for the tensioner to deal with...
Any observations fine, but it worked for me!
Thanks for previous posters input as well it all alluded to the fact it was not as simply as line them up and tighten down