Hong Kong–United Kingdom relations a deeply important role in the formation of the modern Hong Kong. Sovereignty of Hong Kong was ceded to the UK "in perpetuity" on 29 August 1842 through the Treaty of Nanking. The UK further expanded the territory of Hong Kong in 1860 by another cessation, plus a 99-year lease of the New Territories in 1898. The stability, security, and predictability of British law and government enabled Hong Kong to flourish as a centre for international trade. Localisation of teritary institutions, the Hong Kong government and the independent Judiciary in the run-up to the 1997 Handover of sovereignty, caused a
Handover of Hong Kong leftists' aim was to leave the UK without effective control, or "to Macau us". The conflict that arose at that point of the negotiations ended the possibility of further negotiation. During the reception of former British Prime Minister Edward Heath during his sixth visit to the PRC, Deng Xiaoping commented quite clearly on the impossibility of exchanging sovereignty for administration, declaring an ultimatum: the British government must modify or give up its position or the PRC will announce its resolution of the issue of Hong Kong sovereignty unilaterally. In 1983, Typhoon Ellen ravaged Hong Kong, causing great amounts of damage