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

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United Kingdom → St John S, Newfoundland And Labrador, Canada
Item Name Destination Amount Conditions
Meals St John’s, Newfoundland, Canada 47.5 CAD 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 St John’s, Newfoundland, Canada 117 CAD 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 St John’s, Newfoundland, Canada 148.5 CAD 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 St John’s, Newfoundland, Canada 186 CAD per night No specific conditions
Breakfast St John’s, Newfoundland, Canada 23 CAD per meal No specific conditions
Lunch St John’s, Newfoundland, Canada 43 CAD per meal No specific conditions
Dinner St John’s, Newfoundland, Canada 65.5 CAD per meal No specific conditions
Incidentals St John’s, Newfoundland, Canada 0 CAD 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 St John’s, Newfoundland, Canada 8.5 CAD per day No specific conditions
Transport St John’s, Newfoundland, Canada 8.5 CAD per day Covers daily travel between the employee's hotel and office.
Total residual St John’s, Newfoundland, Canada 148.5 CAD 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.