Sorry for not writing sooner.
My nasty hospital test seems to have produced results. The consultant was grinning cheesily, I seem to have been diagnosed with something really obscure that he may have some fun bragging about on the golf course. I'll be cautious, until the MRI scan is done, I'll not go in for any optimism, however there is a 90% chance the blighter causing me these problems is benign.
Love to you all.