Hi I'm pregnant with number 3 and as such need to change my car. We will have 1 in Britax hbb, 1 in besafe isofix erf seat (which is bulky)and a baby in isofix baby seat. I therefore need 3 across the back seat, all isofix. I've thought about people carriers, thought a second hand s max or vw Sharon might work? We would use extra seats for going on holiday where grandparents might come with us, would back seats in these cars be suitable for adults? Are they safe( I've been Googling and reading about crumple zones...and freaking out....?) Any suggestions appreciated!