I had a recent enquiry about this old style formation and I have now received a more authoritative account of it by someone who played at the time:
'The W formation comprised of two fast, or tricky wingers, a centre forward. The two inside forwards were playmakers, and would see-saw depending on the flow of play behind the front three. The wing halves were also play makers charged with turning defence into attack. The cetre-half ( my playing position) was defence, and the pivot position for the full backs to operate the off-side trap when feasible. Of course this all went out the window when the Hungarians showed another way of playing the game, which I witnessed at Wembley. I often wonder if reverting to the old style ocasionally, would confuse the opposition.'