| Plant, | ||||||||||||||||
| Land and | equipment | Assets in | ||||||||||||||
| buildings | and vehicles | construction | Total | |||||||||||||
| £m | £m | £m | £m | |||||||||||||
|
Cost at 1 January 2016 |
7,305 | 10,775 | 2,670 | 20,750 | ||||||||||||
|
Exchange adjustments |
956 | 1,100 | 271 | 2,327 | ||||||||||||
|
Other additions |
117 | 384 | 1,043 | 1,544 | ||||||||||||
|
Capitalised borrowing costs |
— | — | 30 | 30 | ||||||||||||
|
Disposals and write-offs |
(349 | ) | (1,422 | ) | (53 | ) | (1,824 | ) | ||||||||
|
Reclassifications |
110 | 512 | (761 | ) | (139 | ) | ||||||||||
|
Transfer to assets held for sale |
(378 | ) | (114 | ) | (32 | ) | (524 | ) | ||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Cost at 31 December 2016 |
7,761 | 11,235 | 3,168 | 22,164 | ||||||||||||
|
Exchange adjustments |
(127 | ) | (62 | ) | (45 | ) | (234 | ) | ||||||||
|
Other additions |
69 | 296 | 1,219 | 1,584 | ||||||||||||
|
Capitalised borrowing costs |
— | — | 30 | 30 | ||||||||||||
|
Disposals and write-offs |
(376 | ) | (685 | ) | (31 | ) | (1,092 | ) | ||||||||
|
Reclassifications |
602 | 1,186 | (1,826 | ) | (38 | ) | ||||||||||
|
Transfer to assets held for sale |
(462 | ) | (219 | ) | (14 | ) | (695 | ) | ||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Cost at 31 December 2017 |
7,467 | 11,751 | 2,501 | 21,719 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Depreciation at 1 January 2016 |
(2,914 | ) | (7,415 | ) | — | (10,329 | ) | |||||||||
|
Exchange adjustments |
(377 | ) | (717 | ) | — | (1,094 | ) | |||||||||
|
Charge for the year |
(338 | ) | (640 | ) | — | (978 | ) | |||||||||
|
Disposals and write-offs |
205 | 1,270 | — | 1,475 | ||||||||||||
|
Transfer to assets held for sale |
165 | 92 | — | 257 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Depreciation at 31 December 2016 |
(3,259 | ) | (7,410 | ) | — | (10,669 | ) | |||||||||
|
Exchange adjustments |
50 | 110 | — | 160 | ||||||||||||
|
Charge for the year |
(299 | ) | (689 | ) | — | (988 | ) | |||||||||
|
Disposals and write-offs |
158 | 539 | — | 697 | ||||||||||||
|
Transfer to assets held for sale |
314 | 190 | — | 504 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Depreciation at 31 December 2017 |
(3,036 | ) | (7,260 | ) | — | (10,296 | ) | |||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Impairment at 1 January 2016 |
(274 | ) | (373 | ) | (106 | ) | (753 | ) | ||||||||
|
Exchange adjustments |
(45 | ) | (37 | ) | (11 | ) | (93 | ) | ||||||||
|
Disposals and write-offs |
91 | 135 | 35 | 261 | ||||||||||||
|
Impairment losses |
(135 | ) | (117 | ) | (6 | ) | (258 | ) | ||||||||
|
Reversal of impairments |
38 | 38 | 2 | 78 | ||||||||||||
|
Transfer to assets held for sale |
46 | 10 | 22 | 78 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Impairment at 31 December 2016 |
(279 | ) | (344 | ) | (64 | ) | (687 | ) | ||||||||
|
Exchange adjustments |
8 | 2 | (2 | ) | 8 | |||||||||||
|
Disposals and write-offs |
210 | 104 | 28 | 342 | ||||||||||||
|
Impairment losses |
(194 | ) | (138 | ) | (17 | ) | (349 | ) | ||||||||
|
Reversal of impairments |
7 | 9 | 1 | 17 | ||||||||||||
|
Transfer to assets held for sale |
87 | 8 | 11 | 106 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Impairment at 31 December 2017 |
(161 | ) | (359 | ) | (43 | ) | (563 | ) | ||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Total depreciation and impairment at 31 December 2016 |
(3,538 | ) | (7,754 | ) | (64 | ) | (11,356 | ) | ||||||||
|
Total depreciation and impairment at 31 December 2017 |
(3,197 | ) | (7,619 | ) | (43 | ) | (10,859 | ) | ||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Net book value at 1 January 2016 |
4,117 | 2,987 | 2,564 | 9,668 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Net book value at 31 December 2016 |
4,223 | 3,481 | 3,104 | 10,808 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||
|
Net book value at 31 December 2017 |
4,270 | 4,132 | 2,458 | 10,860 | ||||||||||||
|
|
|
|
|
|
|
|
|
|||||||||