We sent in our new Jazz today for a towbar to be fitted, they've had problems with the electrics so have kept it. Unfortunately we're away and won't get it back for over a week. Fortunately we still have our old Jazz to use. Not got much confidence with the dealer!
We also asked the about mk2 alloys on the mk3, there only response 'another customer tried they fitted but the car handled funny' great technical response! Honda UK said ask your dealer.