Aye, we have around 60 British breeds with all kinds of lovely fleeces and all habituated to our conditions to some extent.
But I know that even Mrs Scothebs herself, our lovely Fleecewife, has a soft spot for these cute creatures!
The whole import vs AI/embryo transfer thing is a tricky one.
As a farmer in an area clinging on to its 'TB free' status, I'd have to say that if people must import bloodlines, of whatever species and breed, then less actual live animal importation is preferable. So on that basis, bringing in only a few animals and then breeding up locally is preferable.
But I do have misgivings about the use of intrusive fertility mechanisms. Less so when we're saving one of our own rare breeds, perhaps, than when it's being done to introduce an animal from elsewhere. Especially when, as far as one can make out, the only attribute this sheep has over any of our native (or already present) breeds is its cuteness.