Rik
I had this a few years ago and, as Mick says, it is a one off test involving ( an attractive young lady!) coating your chest and abdomen with KY jelly and running an ultra sonic probe over it. Entirely painless and is a one off process – if you're OK then you're OK – and something else will get you in the end!
Maybe we are lucky down here but this, and other similar tests, flu injections etc. are offered automatically by our doctors surgery and we don't need to seek them out.
OK Roy I take the point that this is not a ME/MEW topic but it is certainly relevant to readers continuing to have the ability to persue the hobby! After all, with the length and complexity of some projects, longevity is essential!
Regards
Norman