Thanks. I have one locally.
I have in fact just made a successful attempt to separate the inner cage from the arm rest. Tomorrow, I'll fit it.
I can see that all the console forward of the handbrake stays put.
I anticipate that there will be five locating holes to anchor the arm rest.
The arm rest will give me an Aux-in, as well as a 3 position rest, with space for either a CD interchanger, or multi media connects.
Volkeswagon quoted £622 for the arm rest, fitted. I picked mine up on Ebay for £60, in excellent condition, plus a tenner for extra piping , so the rear air vents in the arm rest will work. The rest also has two classy cup holders that pop out from a drawer.
I am saying all this, not having actually fitted it, but, hopefully, tomorrow morning will see the job done.
Thank you again for the info regarding the torx driver/set , I suspect that will stand me in good stead for other jobs on the car.