Net finance costs (Tables)

12 Months Ended

Dec. 31, 2019

Text block [abstract]

Schedule of Information About Finance Income and Costs

All figures in £ millions	Notes		2019			2018			2017
Interest payable on financial liabilities at amortised cost and associated derivatives				(22	)		(42	)		(99	)
Interest on lease liabilities				(45	)		—			—
Net foreign exchange losses				(5	)		(36	)		—
Finance costs associated with transactions				—			(1	)		(6	)
Derivatives not in a hedge relationship				(12	)		(7	)		(5	)
Derivatives in a hedge relationship				—			(5	)		—
Finance costs				(84	)		(91	)		(110	)
Interest receivable on financial assets at amortised cost				15			18			20
Interest on lease receivables				11			—			—
Net finance income in respect of retirement benefits		25		13			11			3
Net foreign exchange gains				—			—			44
Derivatives not in a hedge relationship				2			6			12
Derivatives in a hedge relationship				—			1			1
Finance income				41			36			80
Net finance costs				(43	)		(55	)		(30	)