Took my headlining off this afternoon. It was a struggle trying to get it out without damaging it and in one piece. I managed to pull about a fifth of the thing out from the rear hatch but it just would not budge further. Got my other half to push the lining from the inside outwards whilst I pull the board from the hatch, still would not budge. In the end, I had to force the thing out, damaging it, BUT it is still in one piece - salvageable. It was so difficult to remove, that I can not imagine putting it back on!
I will need to improvise as not sure I can reuse the original headlining board. I can use the old headlining board as a template. There was a thread using mdf (wrapping this with cloth or vinyl?) or using a piece of carpet. Any more ideas?