Since there seem to be quite a few 312 fans here, this may be of interest:
http://am12fund.amemua.co.uk/
It's a group that are trying to raise funds to preserve one of hopefully all the vehicles from the last surviving class 312 (ex c2c 312791), which is currently in use for fire service training. I've only just come across it, so don't have many details, but it sounds very good, and worth looking into. At least it sounds like the unit is safe for a number of years, and it seems the group hopes to have built up funds by the time it is sold to purchase it, and in this time also find long term accomodation for the unit.
Of cource, as a 312 fan, I an forced to point out that that 312s were never refered to as AM12s, being givern the tops number from the start
