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Cash Generated from Operations (Tables) | 12 Months Ended
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Dec. 31, 2022
Cash Generated from Operations. |
Summary of cash generated from operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021 | ​ | 2020
​ | ​ | £m | ​ | £m | ​ | £m
Operating profit |  | 317 |  | 347 |  | 294
Adjustments for: |  |  |  |  |  |
– Depreciation and impairment of property, plant and equipment |  | 148 |  | 128 |  | 132
– Depreciation and impairment of leased assets |  | 106 |  | 78 |  | 78
– Amortisation and impairment of intangible assets (excluding computer software) |  | 118 |  | 74 |  | 82
– Amortisation and impairment of computer software |  | 22 |  | 17 |  | 19
– Other non-cash items |  | 8 |  | 6 |  | (1)
Changes in working capital (excluding the effects of acquisitions and exchange differences on consolidation): |  | ​ |  | ​ |  | ​
– Inventories |  | (4) |  | (3) |  | (23)
– Contract costs |  | (10) |  | (5) |  | (2)
– Trade and other receivables |  | 37 |  | 59 |  | (19)
– Accrued income |  | (32) |  | — |  | 2
– Trade and other payables and provisions |  | (75) |  | (43) |  | 78
– Contract liabilities |  | 81 |  | 11 |  | 13
Cash generated from operations |  | 716 |  | 669 |  | 653
​

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