Thanks for the info on the besafe, TBH that is more of an advantage then anything else for us because it means more leg room for a 3 year old!
It could be behind the passenger seat? I'm short, DH needs more leg room, if we're both in the car I prefer not to drive. I have my seat up on top of the stearing wheel anyway 
and my current car is SOOO TINY that even with forward facing seats the seat on front has to be a bit forward to allow leg room, I think we'll cope