I spent most of last week at the European Union’s Joint Research Centre in Ispra, Italy. I have been collaborating with the scientists in the European Union Reference Laboratory for alternatives to animal testing [EURL ECVAM]. We have been working together on tracking nanoparticles and, more recently, on the validity and credibility of models. Last week I was there to participate in a workshop on Validation and Acceptance of Artificial Intelligence Models in Health. I presented our work on the credibility matrix and on a set of factors that we have developed for establishing trust in a model and its predictions. I left the JRC on Friday evening and slipped back in the UK just before she left the Europe Union. The departure of the UK from Europe reminds me of a novel by José Saramago called ‘The Stone Raft‘ in which the Iberian penisula breaks off from the Europe mainland and drifts around the Atlantic ocean. The bureaucrats in Europe have to run around dealing with the ensuing disruption while five people in Spain and Portugal are drawn together by surreal events on the stone raft adrift in the ocean.