In reply to laurie:
When are you free? I can't pay you but I make a grand cup of tea and the biscuit tin is full.
In serious though I do agree with you, there is certainly a lot more to it than you think. For me its cost prohibitive to get someone in at the moment, but if there was more prep work or a bigger room I would certainly look into it.
I am not quite sure, its about the top 1-2mm. There is solid plaster under it and it looks like at some point it might have been skimmed over at some point and its that layer.... or its 60 years of paint?
I have plastered / filled over it and I will leave it for a few days before sanding so its really dry.