So, fitted the door latch, didn't fix the window problem - it's activated by the pin switch in in the striker. Also the latch was wired different from mine, even though it was from the same year car! It worked but didn't lock from the inside when I pushed the nob down.
In the process I broke the door handle at the usual place, the crappy aluminium snaps the actuating rod off

Anyone swap a latch for a handle and key? :S