I ordered my c4s from opc Glasgow in nov 2005 with a view to march 06 delivery- waited and waited for the driver experience day invite, in august this year chased it up at opc Glasgow - nothing - September same again - then got onto Porsche GB - they said they would chase opc glasgow- still nothing.
Had had enough by this stage and called the Porsche driving experience people directly - they checked that I was entitled to the day , presumeably with opc Glasgow , and I received my invitation within a week.
Moral of the story? - Dont mess around go straight to the driving experience directly.<you can get the number by calling Porsche GB customer services>
I have subsequently been told by a client of mine, formerly a salesman at opc Glasgow that there are more customers than places on the courses so they rely on a percentage of people not bothering to take up their place.
In addition they do operate in the winter,- hope you enjoy what is apparently a fantastic day. I hope to go in February
Oh, and the invitation is valid for one full year from its date of isue.