The Mazda (petrol only) would be a good choice. It's quite a lot bigger than the other two and is probably the right size. Maybe consider a Toyota RAV 4 too.

You don't think a Kamiq or 2008 would have enough space for a couple with one child?

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I am a component of a couple with one child and, no, I don't. Supermini sized cars don't really have enough space in the back for long journeys and the boot is normally too small for camping etc.

I suppose it depends on how often you need the extra space for holiday use or similar.

Even with car prices (and insurance) being as high as they are and hiring costs being significantly higher than before the pandemic, it's always worth doing some kind of cost-benefit analysis to see if its beneficial to run a small car for daily use and hire (or borrow from a friend or relative) a large one occasionally when required.

The difference between a supermini and a mid-larger crossover/SUV could be many £0000s even for a 10 year old second hand example, plus the likely significant difference in mpg or possible need to buy a diesel for the larger car to offset that, and a EU6 one so it can be driven into certain large urban areas and avoid ULEZ penalties.

The Mazda (petrol only) would be a good choice. It's quite a lot bigger than the other two and is probably the right size. Maybe consider a Toyota RAV 4 too.

You don't think a Kamiq or 2008 would have enough space for a couple with one child?

.

I am a component of a couple with one child and, no, I don't. Supermini sized cars don't really have enough space in the back for long journeys and the boot is normally too small for camping etc.

Horses for courses I suppose, but as a component(?) of a couple with two children (both now grown up), the Kamiq's 400 litres would have been more than enough for us.

We had a 1999 Polo with a 245 litre boot when 2nd child came along in 2001. It was replaced in 2002 by a Peugeot Partner Combi which had 650 litres, chosen for the principal reason that the pushchair would go in to boot without needing to be folded!. But after that, the boot capacity of each new car (every three years) went 330 litres, 225 litres, 400 litres, 380 litres. By the time the next car came along (Jazz, 350 litres), the eldest had flown the coop.

When we got our Daihatsu Sirion (225 litre boot, and 64cm shorter than a Kamiq!) in 2008, the eldest was 11 years old and of slightly above average height. There was plenty of space in the back of that for him and his brother (including two trips from Aberdeenshire to Lancashire and the West Midlands).