Anybody had any experience of this ??

It says in the mailshot from my local Vantage VX dealer,

"What owners of second cars, or with family and friends, who own non Vauxhall vehicles may not know, is that part exchanging their "other" vehicle (which has been owned by them for 6 months or more) they could well qualify for a special discount of upto 20% on any new Vauxhall purchased through our exclusive Affinity programme (only available instead of, and not in addition to, any other Vauxhall marketing offer).

Something to bear in mind as I've never seen it advertised anywhere before, or is it a Vantage Vauxhall specific offer ??