Look up per diem reimbursement rates and mileage deductions for business travel worldwide.

Complete
United Kingdom → SB
Item Name Destination Amount Conditions
Meals Honiara, Solomon Islands 198.5 SBD per day Over 5 hours rate: covers subsistence expenses for a period of more than 5 but less than 10 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals Honiara, Solomon Islands 502 SBD per day Over 10 hours rate: covers subsistence expenses for a period of more than 10 but less than 24 hours, measured by reference to the times of arrival in and departure from the foreign country.
Meals and incidentals Honiara, Solomon Islands 709 SBD per day 24 hour rate: covers the total cost of meals and daily hotel-to-office travel for a full 24-hour period.; The actual room rate is paid in addition to this amount (source shows the rate as 'plus room rate').
Lodging Honiara, Solomon Islands 1524.5 SBD per night No specific conditions
Breakfast Honiara, Solomon Islands 136.5 SBD per meal No specific conditions
Lunch Honiara, Solomon Islands 179.5 SBD per meal No specific conditions
Dinner Honiara, Solomon Islands 285 SBD per meal No specific conditions
Incidentals Honiara, Solomon Islands 0 SBD per day Source row labelled 'Other': other expenses incurred during the day; employers may use the individual meal and other rates instead of the over 5 hour, over 10 hour and 24 hour rates.
Drinks Honiara, Solomon Islands 37.5 SBD per day No specific conditions
Transport Honiara, Solomon Islands 70.5 SBD per day Covers daily travel between the employee's hotel and office.
Total residual Honiara, Solomon Islands 709 SBD per day Total residual rate: intended to cover the total cost of meals in a period of 24 hours plus the cost of daily travel between the employee’s hotel and office; the 24 hour rate is the sum of the room rate and this total residual rate.

Source URL:
https://www.gov.uk/guidance/expenses-rates-for-employees-travelling-outside-the-uk
This source provides official travel rate information from gov.uk.