If the UK flag is flying at Buckingham Palace, it means the queen is in the building. If you see that flying above Buckingham Palace, no. It's the Royal South. The Royal Standards of the United Kingdom refers to either one of two similar flags used by Queen Elizabeth II as her sovereign. Two versions of the flag exist. One for general use in England, Northern Ireland, Wales, the Crown Dependencies and the British Overseas Territories,. and the other for use in Scotland.