I think you'd be a bit nuts to toss in a good (in house if I am reading it right?) job to do an LLM in the UK. (I'm not an IP lawyer but I've worked with a fair number of them in the tech sector both in private practice and in house (I qualified in 1994). Are you involved in soft IP, or hard stuff? Perhaps you could consider a distance learning course with comparative law aspects, such as this one at KCL, to get you started without committing to a move?

http://www.kcl.ac.uk/law/research/centres/european/programmes/copyright.aspx

yes "nuts" does seem to be the most common word I am getting.
Thanks for the link and will look into it. Much appreciated.