Hi all, thanks for the welcomes.
CrazyPhD,
I'm in the social sciences, so not a lot of overlap with cell biology. And this is a post-doc on a research project that happened to be looking for basically my exact set of skills & interests, down to some relatively obscure (at least in the US and still mostly in the UK) methods. I wasn't trying to get a UK gig at all, I was just applying to everything that appealed & fit my interests, and this is the best one that worked out.
So, sorry I can't offer more advice or suggestions, this was just luck and the randomness of the job market.