Britain's Catherine, Duchess of Cambridge leaves the Commonwealth Observance at Westminster Abbey, in central London on March 9, 2015. The Observance is the biggest multi-faith celebration in the United Kingdom and takes the form of an hour long service in Westminster Abbey. Featuring a mixture of testimonies, readings, hymns and musical performances, it is attended by politicians, High Commissioners, Commonwealth dignitaries and also by over 1,000 schoolchildren, with 2,000 people present in total. AFP PHOTO / JOHN STILLWELL / POOL