The procession will be followed by two minutes' silence during which 273,800 petals - one for each person killed - will fall from the galleries and dome of St Paul's. The petals have been chosen to represent each of the countries affected by the tsunami, with jasmine for Indonesia and Burma, waterlilies for Sri Lanka, Thailand and Bangladesh, lotus for India, pink rose of the Maldives, protea for Tanzania, Kenya and Somalia, orchid for the Seychelles and hibiscus for Malaysia.