Just for the record, I collected my Brera last Wed. showing just 7 miles on the clock. It was supplied by Meridien Milano of Bournemouth to the promised date and to spec. It has no "rocking seats" (yet) and came with only two Electronic Keys; there was no Code Card despite references to one in the Handbook.
Alfa Customer Care confirmed that they no longer issue Code Cards and that all Alfa Dealers have access to the relevant data.
First 100 miles returned 21 mpg, possibly thanks to the Air Con.
So far everything works "as it says on the tin".