That is not my real question, perhaps I have not been clear. I am here in the UK physically with my passport. The conveyancers say that the passport would be sufficient ID if I lived in the UK, but being as I live abroad, the passport needs to be certified. This seems ridiculous to me. The passport is a world-wide ID valid everywhere. The fact that I do not reside in the UK seems irrelevant to me. I am physically here and show my passport. How can it need to be certified? What is the difference with a UK-resident showing his passport and that being valid and me doing the same?