This ancient ceremony has taken place every three years for hundreds of years, reconfirming the boundary of the Tower of London. This year, the school children taking part were from the Central Foundation Girls School in Tower Hamlets. The Procession was lead by the Governor and Chief Yeoman Warder and Yeoman Body. They were joined by the Deputy Governor, Tower Chaplain and Sexton, Director of Music and Choir, staff and families and Chapel congregation. This historic event was again most enjoyable and delighted the thousands of people onlooking, as the procession passed by. The ceremony is well explained here, on the Historic Royal Palaces website.