Tested them all now, I tested these three.
Mountain Warehouse - Orange Airbed
This airbed from Mountain Warehouse is incredibly lightweight, probably weighing under 1kg. However, it's quite narrow, making it difficult to find a comfortable position. It claims to be self-inflating, but the inflation is minimal, and it lacks sufficient cushioning, leaving you feeling the floor beneath you.
Rating: 3/10
Decathlon Comfort - Blue Self-Inflating Camping Mattress
Weighing approximately 1.5kg and compact in size, this airbed offers a decent sleeping area, slightly smaller than a single bed but larger than your average airbed. It self-inflates effectively, requiring only a few additional breaths, and features convenient vents to prevent air loss. Nice and comfortable, far better than most airbeds.
Rating: 8/10
Decathlon Ultim - Grey Self-Inflatable Camping Mattress
The Ultim from Decathlon comes in a massive 1 metre square bag, weighing just under 3kg. Offering more sleeping space than the Comfort and double the cushioning, it provides exceptional comfort, akin to a proper bed. However, its size requires more effort to inflate fully, and it's noticeably heavier and pricier than the Comfort.
Rating: 7/10
We've decided to go for the Decathlon Comfort, given the difference in price and size the slight lack of comfort compared the the Ultim is worth it, if you weren't carrying the kit miles to your campsite it would be the Ultim however. Hope that helps!