It's only the Bugaboo and Nuna ones. But I wouldn't bother getting the compatible one for the base - it doesn't make sense to pay £340 for a spin car seat up to 105cm that will hog the base, so you can't use it again for the baby seat if you have another baby.
At 12 months old, you need to stay rear facing and there are basically two options:
Get a spin seat which comes with its own isofix base already attached - e.g. Cybex Sirona, Britax Dualfix, Maxi Cosi Mica Eco. These last up to 105cm (around age 4, but check your child's centile in their red book to estimate their age at 105cm), spin to the side and often have the option to turn forward facing later on. (Minimum 15 months but the longer you can wait, the better in terms of safety.) John Lewis have an excellent price on the Maxi Cosi currently, that's what I'd get if I was buying one today. But the Cybex and Britax have a slightly higher weight limit, which might be worth waiting for Black Friday for in case they come down.
Or get an ERF, Swedish Plus tested seat up to 125cm e.g. Axkid Move/Minikid, Britax Safe-Way M. If you haven't seen these before I would look up your nearest Axkid stockist and go and see some because it's worth comparing them to the isofix spin seats. The benefit of these is they last much longer - up to around age 6/7 depending on the child's centile, again. They are better designed for older children rear facing, offering more leg room and less space taken up in the car compared to a spin seat. However most of them are seatbelt fitted, the isofix options in this category are much more expensive. The seatbelt fitting does afford them a huge weight allowance and some in this category support children up to 36kg in weight which essentially means you never need to worry about weight limits.
Don't bother with the all stages seats up to 12 years - it's a false economy.
Joie Spin 360 is popular, but it's not cheap enough to justify the step down in features compared with the above three. However it's a great option for a second car or grandparents (though honestly - so is the Maxi Cosi Mica at the moment.)
You can also keep using the Bugaboo Turtle up to 83cm/13kg whichever comes first - there is no urgent need to change at age 1 