Thought I'd update this thread having done a small job to sort out the sliding door table catch that was stuck in the up position. Have a 2015 SE for any reference! Ultimately the door stowed table couldn't be put back into place as the mechanism wouldn't engage to hold it in place.
To start, bought a small selection of car / van trim tools from a well known auction site, these were just over £10 for a few different tools and did come in useful for taking off the inside panel of the sliding door.
Started at the bottom left as previous posts suggested, but there were no retaining clips elsewhere along the bottom. Four round each edge, two in the table section, and three in the upper middle sections. The most tricky part was getting the upper right section away as I found it far more difficult to access and get to due to mechanism and movement of the door!
The actual manufactur and design of the retaining clip for the table seem poor in design! Ours just seemed to stick in up position which meant the table could not be clicked back into place. Took it apart, applied some copper grease and added a couple of small washers to the bolts so it didn't pinch together as tightly. Seems to work okay but time will tell!
I did break one of the yellow clips and found it difficult to find a replacement. Even the part number at VW didn't match but tracked some down in the end. One of the pics included shows the correct ones needed on the right as opposed to what I ordered on the left.
I'd say I have average DIY capability and with a bit of dedicated time over a weekend, completed this easy enough!