[1] Countries with diplomatic missions in Solomon Islands are Australia, Japan, New Zealand, Papua New Guinea, South Korea and the United Kingdom.
Following the outbreak of conflict between the Guadalcanal and Malaitan peoples in 1998, Australia led a multinational peacekeeping and developmental assistance force known as RAMSI, which operated in the Solomons between 2003 and 2017.
[19] The two countries experienced several bilateral disagreements including the Julian Moti affair in 2006-2007 and a 2022 Chinese-Solomon Islands security pact.
[20] On 16 September 2019, after bribing government officials,[21][22][23] Solomon Islands parliament voted to end diplomatic recognition of Taiwan and to recognise China (PRC).
[24] Following this move, a provincial leader had offered to lease the island of Tulagi to China in a deal that the attorney general found to be illegal.
In response, the Australian and New Zealand Governments expressed concerns that the establishment of a Chinese military presence in Solomon Islands would have serious implications for peace and security in the Pacific region.
[52] In March 2015, the New Zealand journalists Nicky Hager and Ryan Gallagher reported that NZ's signals intelligence agency, the Government Communications Security Bureau (GCSB), was using the internet mass surveillance system XKeyscore to intercept email communications from several senior Solomon Islands government ministers, the Solomons Islands Truth and Reconciliation Commission, and anti-corruption campaigner Benjamin Afuga.
[54] In March 2022, Prime Minister Jacinda Ardern supported Australia's concerns about a planned security pact between China and Solomon Islands; claiming that it would lead to the militarisation of the South Pacific.
[55] In addition, the New Zealand Government unsuccessfully lobbied French Polynesian and New Caledonian officials into taking a position on the Chinese—Solomon Islands security pact.
[57] A Joint Communique issued by the two senior officials remarked upon numerous areas of cooperation, including education, and policing, as well as bilateral trade ties.
Solomon Islands and Switzerland established formal diplomatic relations on 20 December 2007, when representatives of both nations signed a joint communiqué in Canberra.
The Foreign and Commonwealth Office assistance to Solomon Islands is focused on security sector reform, good governance, sustainable development and poverty alleviation.
In October 2008, Solomon Islands prime minister Derek Sikua moved to establish economic relations with Venezuela, hoping to benefit from comparatively cheap Venezuelan oil.