Update...3 out of 4 done...

...I think...
...after struggling with the drivers front door for half an hour I thought I'd try the drivers rear door. Got it done in about 5 minutes

then did passenger rear in about the same time. So decided to try drivers front door...again it wouldn't open from the outside handle but it will open with the inside handle...
You get another free beer from me Tim at the next Nats...

I think I have the door handles mixed up...

will check this on the weekend.
Some other tips for this job...
*make sure both the door stirker plate and door mechanism has dry lube
*when closing the door you can carefully check whether the mechanism lines up with the striker plate
*the door striker plate has quite a lot of 'play' and can be rotated clock and anti clock wise (thanks Dave)
*when opending the door make sure the door isn't locked
*and last but not least make sure you have the correct handles on the correct doors as the botton push rods are different lengths...
Tim can you remember if the longer rods are on the front or rear doors?
Stewart