After a fairly exhaustive review we have chosen the fabric for the project; a Prince of Wales plaid.
The Prince of Wale (also known as a Glen plaid or Glenurquhart check) has a long history.
The fabric has a beautiful blue and red stripe. Chris tells me that such a plaid can only be a Prince of Wales when it has this red stripe. I cannot find reference to this rule anywhere else but Chris is not to be questioned. As Phillip from Crescent Trading Company - the only fabric wholesaler left in London told me, "Chris knows his cloth".
Ideally the fabric will wear well, hide dirt and allow me to keep warm. My only concern is how conservative the fabric will look when writ-large in a 3-piece suit. The suit will be done just before Christmas and we shall see.