Several current stage hits suggest British theatre is looking outwards. Andrew Haydon is delighted, but thinks there is a way to go when translating and staging texts from abroadBack in 2008, I wrote a piece for this blog inspired by Sebastian Nübling's production of Simon Stephens's play Pornography, bemoaning the lack of any comparable work here in the UK. Five and a half years on, it feels as if the situation…