Update - DoorhandleAs
previously mentioned my door handle snapped, well a new handle arrived today, via little bro's work contacts.
So like the giant pustule nerd I am, I'm gonna write this up as a bit of a D.I.Y fixing a mk2 golf/jetta door-handle/ lock barrel etc, bare with me here.
DIY - Mk2 Golf-Jetta doorhandle

Here we have the donor handle, trim a philips screw driver, needle nosed pliers and a set of keys.
these are the tools you will need to swap out your door handle/ fix or check the lock drum etc

This view shows the fairly simple mechanical innards of the handle/ lock mechanism,
You will probably need to swap the lock drum out so your key will work with your
(most likely)2nd hand donor handle.
If your the kind of person who pulls things to bits and forgets how to throw them back
together draw a quick sketch of of how everything fits to reference later.

Getting the drum out is fairly simple, You will fins a screw on the end of the mechanism
as seen in my fantazmical image above, unscrew this and pull the lock off.
your lock drum should now slide out fairly easily. and look something like...

...This, deal with the grease you big girl, if you are having no problems with your lock
congratulations, you have the only twenty odd year old golf that isn't, you can skip past the
next few things I'm about to mention.
DIY - Mk2 Golf-Jetta Lockdrum
As for the rest of you I will now go off on a slight tangent, if you have to wriggle your key, stand on one foot, recite the alphabet and do the
macarena just to get into your car, chances are your drum is having problems, even if your drum seems fine you may as well have a wee looksy while you have your handle off.

Start out by putting your key in the drum, you will see all the drums pins
(im not sure if this is what they're called but it'll do) close into the drum,
this is what makes it possible for you to lock/unlock your car, Smartypantses will already
see the problem with my lock-drum in the above picture, but i'll explain that in the next image more indepth.
Just be on the lookout for dirt build up/ a lack of grease etc fixing your drum could be as easy as cleaning
away excess dirt and spraying it with some wd40.

Through the power of MS Paint it all becomes apparent, the encircled pin isn't sitting flush with
the rest of the drum, so when I try to unlock my car its getting stuck on the innards of the door handle,
I checked the pin for dirt/
cleaned and re-greased it and the drum and it still would not sit flush.
In the end I just removed the pin altogether - its not worth loosing sleep over a single pin
when the lock will continue to work fine with 5 other pins
Removing the pin is as straightforward as it comes, grab your needle nosed pliers
grab the problematic pin and pull, inside the drum you will now see a small spring (provided it hasn't come out with the pin) you should remove this also as a precaution.
By now you should have one door handle with a working locking mechanism, all you have to do now is throw the handles rubbers back on and put it back on the door the same way you took it off.
Be sure you test that your lock is working before tightening the two bolts which hold the handle in place, it can get frustrating removing/ replacing the handle because you haven't matched everything up right.
Last hint, when throwing your handle back onto the door, keep the door locked, or the mechanisms will not match up.
hope this has been handy for someone, and I apologise for my haphazard writing style