Have a look at extended rear facing car seat safety on facebook, lots of reccomendations on the longest lasting car seats and if they will fit in particular cars
https://www.facebook.com/groups/carseatsafetyuk/?ref=share have a look at this group. They will be able to advise based on your baby.
We moved to the Joie ispin 360 when she was about 7 months. It has 6 different reclining position, not as much of a bucket seat as some of the others so it’s wider and I can personally vouch for its safety in an accident.
@Emma oh wow thank you. Will have a look x
@Emma I also have this for my almost 10 month old. He has been in it for about 6 weeks and is so much happier. My daughter has the same seat and is 3.5 years so has nearly outgrown it with a max age of 4.
We’ve just bought the Joie 360 spin, lots of great reviews for this one! Plus it has a price match online at the moment, so it’s £177 instead of £250 on mamas and papas at the moment!