The Broussard didn't intentionally land on the M62. He had a major oil leak from the CSU while in the circuit (for 09, IIRC). With very limited visibility due oil all over the screen he put it into a field. The field wasn't long enough, and the aeroplane went through the far hedge and down the embankment onto the motorway.
It squashed a passing 2CV (unfortunatly, with fatal results for one of the 2CV occupants, also IIRC).
Moral - never, ever consider buying a 2CV.
Re the Trafford Centre Cessna. I beleive it was trucked in - LAC did a similar publicity promotion in central Manchester a few years ago, with a trucked-in Cessna.
SSD