Mellotronists

I'm with you JK.
Mellotron flutes all the way. The track "Teacher I need you" which definitely 
has tron on it is on the same album (Don't shoot me, etc.), so they were 
obviously well into the instrument at the time. And for that, together with 
the evidence you provided makes the case for very strong. It doesn't 
necessarily follow that what is recorded at the time is used on the final 
production, he says, speaking from experience!
Andy K
m400 # 1405