| 2017 | 2016 | |||||||
| £m | £m | |||||||
|
Cost at 1 January |
5,965 | 5,162 | ||||||
|
Exchange adjustments |
(228 | ) | 814 | |||||
|
Additions through business combinations (Note 38) |
— | 7 | ||||||
|
Transfer to assets held for sale |
(3 | ) | (18 | ) | ||||
|
|
|
|
|
|||||
|
Cost at 31 December |
5,734 | 5,965 | ||||||
|
|
|
|
|
|||||
|
Net book value at 1 January |
5,965 | 5,162 | ||||||
|
|
|
|
|
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|
Net book value at 31 December |
5,734 | 5,965 | ||||||
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|
|
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