Thanks for all the advice.
I am meeting Brian from Ocean Explorers on Wednesday to be measured up and I am fairly confident that he will get the (possibly rahter odd) dimensions right.
I was hoping that nobody would have had tales of woe and appalling problems with these suits and to date nobody has so I am fairly happy.
If only I was a size smaller I would jump at a brand new (and half price) DUI TLS350
http://www.deepbluedive.com/product.aspx?id=11295 but my problem is my suit is stopping me from reaching my vales at present so I cant take a risk on a slightly smaller size than their charts suggest I should (even if it is only a few inches the missis tells me it makes all the difference).
This is what I am looking at, and at £100 off PB's own price -
Ocean Explorers, The Online Technical Diving Centre