North Korea is holding its most important political gathering in a generation, where Kim Jong-un will consolidate his control of the country. The first full congress of the ruling party in 36 years is being closely watched for any shift in policies or changes in political leadership. Mr Kim is expected to reassert his nuclear ambitions, amid speculation he will soon conduct a fifth nuclear test. Foreign media have been invited but are not been allowed inside the venue. The capital was spruced up ahead of the event and citizens lay flowers in central squares as it got under way. The streets are lined with National and Workers' Party flags with banners that read "Great comrades Kim Il-sung and Kim Jong-il will always be with us" and "Defend the headquarters of the Korean revolution at the cost of the our lives". It is the seventh meeting of North Korea's Worker's Party and the first since 1980, and is being held inside the April 25 House of Culture, now covered in vast red and gold banners and massive images of the current leader's father and grandfather. This year's event is shrouded in secrecy. The BBC's Stephen Evans is one of about 100 foreign journalists invited but says reporters are being closely monitored. Kim Jong-un is inside the hall, our correspondent adds, with guards lined up outside. The agenda and duration of the event is not known but experts say Kim Jong-un is likely to declare his so-called "byongjin" policy, which is the simultaneous push towards economic development and nuclear capability. It could also see a new generation of leaders put in place. The meeting will elect a new central committee, which appoints a Politburo - the central decision-making body of the Communist party - and many say loyalists to the current leader will be rewarded with high profile posts. Who he chooses will be watched carefully. In 2013 Kim Jong-un had his uncle executed for "acts of treachery" and there have followed many reports of purges of high profile figures in the establishment. Some experts have said that Mr Kim's sister Kim Yo-jong, with whom he attended school in Switzerland, is tipped for promotion. Many observers will scrutinise announcements carefully to evaluate the North's commitment to a planned economy and hints at reform, but the congress is also being seen as the public stage for Kim Jong-un to define his leadership for the years to come. No congress was held during the rule of Kim Jong-un's father, Kim Jong-il. His death in 2011 brought Kim Jong-un to power when he was still in his twenties. The 1980 congress, held before Kim Jong-un was born, saw Kim Jong-il presented as successor to the North's founding leader Kim Il-Sung.
