The more I think about it, it has to be WGS.
Why would the club invite WGS to Staplewood and why would WGS go there. If it's not true, why wouldn't the club deny it.
I'm sure that AO must be media savvy enough to know the frenzy it would cause and the easiest way to quell the excitement would have been to deny that WGS was at Staplewood, even if he was there on the off chance.
In my mind it has to be WGS otherwise, what is the point?