OK, this is the extra bit for the Evolva:
"A highly-rated seat that performed well in our safety tests, this Best Buy from Britax is very similar to the Evolva 2/3 ISOFIT model, except it's not secured to the car with Isofix mounts.
Our experts thought this seat was suitable for children aged 4 to 12. There are good instructions and it's easy to carry.
As it isn't secured in with the Isofix system, it might fly around on your back seat when your child isn't sitting in it ? a minor complaint for an otherwise excellent seat which our testers praised for its high finish quality.
Pros: Safe, good instructions, easy to carry, covers are easily washable
Cons: Not Isofix
Contact details:Britax 01264 386027
Britax Evolva 2/3 Ultra
Price (£) 90
Total score (%)74
Best Buy
Availability
Limited availability online and on the high street
Features
Specifications
Seat categories Group 2/3
Weight groups 15-36kg
Weight (kg) 6
Part of a travel system No
Ratings
Comfort 4/5
Performance
Front crash 4/5
Side crash 3/5
Overall safety 4/5
Fitting and using
Fitting in car 4/5
Belt routing 5/5
Buckling up 4/5
Daily use 5/5
Instructions 4/5
Correct use 5/5
The isofix one is 1kg heavier and scores 4/5 in side crash, 5/5 for buckling up and for instructions, otherwise it's the same.