@andyscotland
Finally the article I've been looking for - and perhaps the drawing too - and still can't find a tidier solution
What did you do and did Building control go for it? Seems a bit tricky to install... I was planning on DPM, screwing the wall plates through it (with silicone) and then just 'tanking' each area in VCL but appreciate there are gaps...
Thank you !
Simon