Halfords currently have a 10% of all car seats taking this to £116.99 and Quidco is a further 5% taking it to a potential £111.14.
BUT this is not really the reason i am posting. It has been commonly known for a while that 5 point harnesses are the safest way for your child to travel for as long as they can. Unfortunately, car seat manufacturers decided that in the UK there was only demand for these up to the age of 4 (15 kg or 33lb). You can use the 5 point harness on this car seat upto 29.5 kg or 65lb if you choose.
The official version...
3-in-1 multi-mode Car Seat for longer use 20 pounds to 100 pounds
Extended 5-point harness for children 20-65 pounds
Converts to High-back belt positioning booster for child 30 pounds to 100 pounds
Converts to backless booster for child 40 pounds to 100 pounds
Steel reinforced frame for durability
Versatile, Convertible Design Lasts through Early Childhood
The Nautilus features an extended five-point harness design that can accommodate children over the age of one, from 20 to 65 pounds in weight--a wider range than most other forward-facing car seats. As your child grows, the seat easily converts to a high-back booster and then, lastly, to a backless booster for a child up to 100 pounds in weight. A steel-reinforced frame and superior construction help to ensure safety and durability through years of use.
Built for Comfort and Superior Safety
You can rest assured that your child will have superior protection while riding in the Nautilus, thanks to extensive crash testing and a steel-reinforced structure. The car seat meets or exceeds US Safety Standards, including U.S. Compliance Standard FMVSS 213; the New Car Assessment Program (NCAP), with peak Crash Force approximately twice the Car Seat Standard; and tests for Extreme Car Interior Temperatures. EPS energy-absorbing foam provides additional security and comfort.
As well as being secure and safe, your child will feel extra-comfy, too, with an easily adjustable head support, cushioned seat, and wide armrests; a cup holder and side storage keeps snacks and treasures close at hand.