Finance costs (Tables)

12 Months Ended

Dec. 31, 2020

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Summary of Financial Income and Expenses

	2020 $m			2019 $m			2018 $m
Financial income
Financial income on deposits and money market funds		2			3			2
Interest income on loans and other assets		2			3			3
		4			6			5
Financial expenses
Interest expense on external borrowings		102			78			61
Interest expense on lease liabilities		37			41			39
Capitalised interest		(1	)		(5	)		(5	)
Unwind of discount on deferred purchase consideration		1			1			1
Other chargesa		5			6			5
		144			121			101
Analysed as:
Financial expenses before exceptional items		130			121			101
Exceptional financial expenses (note 6)		14			—			—
		144			121			101

a  Other charges includes bank charges and non-bank interest expense.