ISE W288 advice for door needed

The door lock hook on my W288 just got broken off (don’t ask! 😳 ) and I’ve seen I can order one from UK Whitegoods, though it will take a few weeks for delivery. I don’t know, however, if I need to order the cover for it at the same time.
The hook is this one https://shop.ukwhitegoods.co.uk/8078973 … -lock-hook and the cover this one https://shop.ukwhitegoods.co.uk/8078975 … hook-cover
Both fit several models – W1407, W1607, W288eco, W256

I thought I would try to remove the broken hook part, which appears to require taking the door apart as removing the screw next to it didn’t seem to loosen it, but once I’d undone all 5 ‘star’ screws (fortunately I have a star screwdriver set!) I didn’t seem to be able to get anything apart but didn’t want to force it in case another part got broken. I wondered if the cover slides off the plate with the hook but it doesn’t seem to want to budge either.

All I need are some helpful hints as to exactly what to do to remove the old hook and replace it. Once I can get it out I will know if I need to order the new cover too!
Thanks in advance.