hi all, as I am a very proud daddy of a 6 month old who is rapidly outgrowing the belt in car seat that came with the travel system, I have been offered a seat which will go up until he is around 4 by my cousin, it's a very smart top of the range seat, but it needs something called isofix, which if truth be told, I really know very little about, I always thought that it's something built into newer cars which fits universally to things like car seats, but I'm just wondering if this system is backward compatible and could be retrofitted to my phase 1 v40, as from what I can work out its not something it comes with as standard.
Many thanks in advance
