My opinion is that if Biotest found a way of selling to the UK, they would absolutely make a fortune.
I am lucky in that I can afford to buy from BT. The majority of friends can't and they would love to.
What the icing on the cake would be to actually sell to UK at a similar price that they do in the UK. They would then have the cheapest and most superior products on the market.
I am sure that they have investigated this and either didn't find it currently feasibile or are actually in the process of doing it.
I would be interested in the company's view on this, if they can make it public.