I'm pretty sure it has to have been active in the last 10 years.
From what I've heard, it really isn't a great deal of hassle, Rog (I have friends and colleagues that have done it themselves).
I'll let you know how I get on, and you can make the decision based on some reliable intel.
Gone but not forgotten:
325i M Sport (E92), Black Sapphire, Coral Red Dakota, 19" 225's, Seat Heating, 6FL and de-badge
Replaced by 6.2 litres of AMG powered C class.