UPDATE: I gave up with the size 7W's and gave them to a friends son.
The boots were excellent other than rubbing the skin from my heel. I tried the lacing patterns etc..
So I have bought another pair brand new in 6W (all my other shoes are 7's) for £50 from evilbay, which seem to be working well

I am of the opinion that the W in 6W means a half size extra as well as wide.
Eddie