Apologies Tomcat as I believe that you also suggested replacement springs in the other post and I got carried away, with my ramblings, and forgot to comment further!
My first action was to try and further tension the spring, (not very easy to do), but when I did some tests, (with various components temoved), I noted that the cause of the reluctance to return all the way was definite friction on the handle stem.
The spring could denitely be the cause, however, as if the spring is tired, ('if' on a 20 year old vehicle!), then the handle will tend to snag more readily with the slightest resistance - so I will keep an eye on it!
On this particular occasion a bit of light filing, thorough cleaning and a re-grease has sorted mine for now but I have yet to do the drivers side, (hopefully tomorrow)!
At least the handle is flush with the trim - it was about 5mm proud previously.
Just need to learn how to put the door cards back as I can't get the pins out of the door!
Is there a trick or am I missing something?