Queen Elizabeth and Prince Philip headed up a lavish show of hospitality on Tuesday to welcome King Abdullah, the first Saudi monarch to make a state visit in 20 years.
Despite both now being in their ninth decade, the indomitable pair played a high profile role in a day full of pomp and circumstance.
The Duke of Edinburgh accompanied the Saudi monarch as he reviewed a Guard of Honour in central London, and then handed hosting duties over to the Queen who rode back to Buckingham Palace with the king in a state coach.
An exchange of personal gifts was also on the agenda, with the British sovereign offering her Middle Eastern counterpart - who is in the UK on a three-day visit - framed photographs of the royal family. In turn, he presented her with a book on the 1938 visit to Saudi Arabia by her aunt, Princess Alice.