So if the scales are variable, they are not made to a particular scale and one kit called be smaller / taller to another. So the kits might look odd together, which is not something one wants, due to these kits all being Thunderbirds themed. They are supposed to go together!
So they not officially sold in the UK, as they are Japanese imports. I suppose you could import them to the UK yourself, depending on how expensive / cheap the postage is from Japan to the UK, but there is a risk of having import fees upon delivery of the parcel.
I am guessing then that Aoshima is a Japanese kit manufacturer then? If I am correct here, I have never heard of them!
Please post images some on this forum when you complete them. I would love to see them.