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

Complete
United Kingdom → Richmond, Sydney, New South Wales, Australia
Item Name Destination Amount Conditions
Meals Sydney, Australia 57.5 AUD 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 Sydney, Australia 147.5 AUD 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 Sydney, Australia 195 AUD 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 Sydney, Australia 227 AUD per night No specific conditions
Breakfast Sydney, Australia 38 AUD per meal No specific conditions
Lunch Sydney, Australia 51.5 AUD per meal No specific conditions
Dinner Sydney, Australia 84.5 AUD per meal No specific conditions
Incidentals Sydney, Australia 0 AUD 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 Sydney, Australia 11.5 AUD per day No specific conditions
Transport Sydney, Australia 9.5 AUD per day Covers daily travel between the employee's hotel and office.
Total residual Sydney, Australia 195 AUD 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.