I’ve got the Maxi-Cosi Pebble 360 pro and FamilyFix 360 pro. It spins and slides out to allow easy access into the car. The same base will be used for the next size up too.
Maxi cosi cabriofix as it's one of the recommended infant seats for a good fit for newborns , and relatively budget friendly
There’s an FB group “Car Seat Safety UK”. Not all seats are made equal in terms of safety and testing. I’d ask on there for advice on which one is recommended.
We've got this one x