Though they say it is not limited, they can only produce a limited number till the end of the mk3 focus (2017?). And most of them will be going outside Europe.
Heard of a global number of 45000 units up to one third will be for Europe. UK may get a larger amount of mk3 RS than you got mk2 RS.

So my guess is that in Europe it will be close to the rarity of the mk2 RS.

I do like it.

Someone need an LHD EsCos.