Silver Cross has a long heritage in British nursery products, and the Motion All Size 360 is its answer to the buy-once question. Rather than an infant carrier, then a toddler seat, then a booster, this is a single seat designed to grow with a child for over a decade. It is the most ambitious seat in our group, and for families who value the simplicity of one purchase, it is a genuinely appealing proposition.
Who is the Silver Cross Motion for?
The Motion is the right seat for a family who wants to buy once and be done. As an R129/i-Size seat approved from roughly 40 to 145 cm, it spans birth to around 12 years in a single unit, removing the later high-back booster purchase that most families make. The headrest and harness range is wide, the 360 degree rotation makes daily loading easy, and ISOFIX is built in. If the appeal of never shopping for a car seat again outweighs everything else, this is the most complete answer here.
It is less suited to parents who want the absolute best seat at each individual stage, because a do-everything seat is inevitably a compromise at any one of them, and it is large and heavy. In the newborn months specifically, a dedicated infant carrier such as the Maxi-Cosi Pebble 360 lifts out of the car and clips to a pushchair, which the fixed Motion cannot. The Motion is the long-game choice, not the specialist one.
How the Silver Cross Motion performs
The full-span promise
The headline is the span. From a newborn in the deepest recline to a 12-year-old in booster mode, the Motion adjusts to cover it all, which in theory means one purchase for the whole of a child's car-seat years. The headrest glides up through plenty of height and the harness extends generously, so the seat keeps pace with a growing child. Whether a single seat is ever truly optimal at every stage is the honest question, but as a one-and-done solution it is impressively complete.
Rotation and install
Full 360 degree rotation makes loading easy even as the seat grows large, letting you turn it to the door. ISOFIX and a support leg are built in, so installation is straightforward and the seat sits stable, with no separate base to manage. The rotation stays smooth even with the seat fully extended.
Safety across the stages
The Motion carries R129/i-Size approval across its whole height range, with rear-facing in the early years moving to forward-facing as the child grows. As with any all-in-one, you accept that a seat covering this much cannot be quite as tailored to one stage as a specialist seat, but the safety approval is consistent throughout.
Everyday use
Day to day it behaves well, with sensible recline positions and a clear adjustment range. The main thing to be aware of is size: this is a substantial seat that stays in the car, so it suits a family who fits it once and leaves it.
The honest downsides: bulk and the all-rounder compromise
The Motion's drawbacks are inherent to its ambition. It is large and heavy, very much a fit-and-leave seat, and a seat that has to suit a newborn and a near-teenager is never going to be perfectly optimal at either extreme. If you need three seats across a back row, measure carefully first. Neither point is a fault, they are the cost of the buy-once approach. If you would rather have the best seat at each stage and accept buying more than once, our buying guide and our guide to the stages talk through that path.
Verdict on the Silver Cross Motion All Size 360
The Motion is our best all-in-one because it delivers on the buy-once promise more completely than anything else here: one R129/i-Size seat, birth to around 12 years, with rotation and built-in ISOFIX, removing the later booster purchase entirely. It is bulky and, like any do-everything seat, a compromise at the extremes, so it suits families who value simplicity over having the perfect seat at each stage. If you would rather optimise the early months, start with the Maxi-Cosi Pebble 360; for a four-year all-in-one at lower cost, the Joie i-Spin 360. Confirm the seat is approved for your car, and read how we test to see how we score them.
