Cylinder head removal

Just about got the head back on the car. Sump to go on and we are ready for lift off. Anyone have any thoughts on re-tightening the head after running to temp and doing again when cool? Not sure if Rover recommended it or not? From past jobs on other cars, you always seem to get a bit more after running. Back the nut or bolt off a bit and then back up the torque setting. Just a thought. Cheers,
Did get all the gaskets from the company suggested. Very good firm to deal with. Got it all back together, sorted. No leaks and best of all no timing chain rattles any more. Mate is over the moon. Back to our own cars issues now. Thanks for all your input and thoughts. Rob