Do United Kingdom passport holders need a visa to visit SB?

UK ordinary passport holders do NOT need a visa in advance for the Solomon Islands. A free visitor permit is granted on arrival for tourism, valid for up to 3 months within any 12-month period (GOV.UK advises stays of up to 30 days per visit). You need a passport valid 6+ months with 2 blank pages, a return/onward ticket, and proof of funds. British citizens travelling to the Solomon Islands for tourism are granted a free visitor permit on arrival at Honiara (Henderson) International Airport. No pre-arranged visa or eVisa is required. The UK Foreign Office (GOV.UK) confirms you can visit without a pre-arranged visa and will be given a visa on arrival; the Solomon Islands visa policy places the UK in the "free visitor permit on arrival" category alongside the US, Canada, Australia and most Commonwealth and EU countries. The permit is issued at no cost and allows a tourist stay of up to three months in any twelve-month period, though immigration officers commonly stamp shorter periods (GOV.UK references up to 30 days per visit; extensions are possible through the Immigration Division). Entry conditions are a passport valid for at least six months beyond arrival with at least two blank pages, a confirmed return or onward ticket, and evidence of sufficient funds. A yellow fever vaccination certificate is required only if arriving from or transiting a country with yellow fever transmission risk. As this is a permit granted at the border rather than an advance authorisation, the best-fit category is visa-on-arrival.