It's almost certain that privately (and legally) importing a foreign made caravan will cost more both in money and effort than for the equivalent caravan already available in the UK, so there would have to be some compelling reason to want to do it.
The OP hasn't told us why he(she) is considering it. However we often see and hear people who casually claim that especially continental caravans are better made and more reliable than UK constructed products, and if that is the principle reason for this thread then they need to carefully review the evidence, before assuming all continental makes are better than UK products.
The adage of the "Grass always looks greener on the other side" could well be very apt in this situation.
Whist it is true we see far less complaints in the forum about continental brands, the reality is there are far fewer continual caravans sold in the UK so the number of complaints are bound to be lower, but whether they represent a lower percentage of failures is difficult to assess as there is no direct means of looking at sales figures.
It could also be the continental manufactures only export their best models to the UK which would skew British buyers perception of quality.
For all we know, our continental cousins might see the same effect in their own countries that makes foreign products look more attractive.
Just make sure you do the homework, becasue a mistake cold be quite costly to get corrected when having to deal across national borders.