Mr Blair had hopeful words for a questioner from Croatia asking about the country's hopes of joining the European Union. He said it was exciting for such countries to have the prospect of joining the EU should they meet the necessary requirements. Asked about his most memorable moment as prime minister, he said it was the signing of the Good Friday Agreement in Northern Ireland. Paying tribute to the World Service, Mr Blair said it played "an absolutely crucial role" in the world. A week of special programmes are being planned to show how the service has developed - both technically and creatively - over the last 70 years.