I'm just in the process of researching and buying in UK and took both buggy and car seat into the dealer to check.
Car seat
We tested the Recaro Young Sport seat (9 months - 4 years). Fitted fine with loads of room for legs. We also too own a Maxi-Cosi Axiss (like original poster) which swivels but it's likely my husband will inherit this for our 'bigger' family car.
Buggy
Now my son is 18 months we've got rid of the stupidly large Uppababy for Baby Jogger City Mini. Upon testing, it fits flat in the boot (with wheels off) or with wheels the boot just shuts with it stood up on its side.
I'd imagine a lot of the smaller umbrella fold up style stroller type buggies should fit ok in there e.g. Maclaren etc.
Hope that helps.
Car seat
We tested the Recaro Young Sport seat (9 months - 4 years). Fitted fine with loads of room for legs. We also too own a Maxi-Cosi Axiss (like original poster) which swivels but it's likely my husband will inherit this for our 'bigger' family car.
Buggy
Now my son is 18 months we've got rid of the stupidly large Uppababy for Baby Jogger City Mini. Upon testing, it fits flat in the boot (with wheels off) or with wheels the boot just shuts with it stood up on its side.
I'd imagine a lot of the smaller umbrella fold up style stroller type buggies should fit ok in there e.g. Maclaren etc.
Hope that helps.