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Intangible assets (Tables) | 12 Months Ended
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Dec. 31, 2022
Intangible assets |
Summary of breakdown of intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Customer | ​ | Indefinite-lived | ​ | Other | ​ | Product | ​ | Computer | ​ | ​
​ | ​ | Goodwill | ​ | lists | ​ | brands | ​ | intangibles | ​ | development | ​ | software | ​ | Total
​ |  | £m |  | £m |  | £m |  | £m |  | £m |  | £m |  | £m
Cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At 1 January 2021 |  | 1,653 |  | 824 |  | — |  | 66 |  | 40 |  | 145 |  | 2,728
Exchange differences |  | 4 |  | (13) |  | — |  | — |  | — |  | (2) |  | (11)
Additions |  | — |  | — |  | — |  | 4 |  | 6 |  | 21 |  | 31
Disposals/retirements |  | — |  | (4) |  | — |  | (3) |  | — |  | (1) |  | (8)
Acquisition of companies and businesses1 |  | 228 |  | 69 |  | — |  | — |  | — |  | — |  | 297
Hyperinflationary adjustment |  | 3 |  | — |  | — |  | — |  | — |  | — |  | 3
At 31 December 2021 |  | 1,888 |  | 876 |  | — |  | 67 |  | 46 |  | 163 |  | 3,040
At 1 January 2022 |  | 1,888 |  | 876 |  | — |  | 67 |  | 46 |  | 163 |  | 3,040
Exchange differences |  | (72) |  | (5) |  | (107) |  | 2 |  | (1) |  | 6 |  | (177)
Additions |  | — |  | — |  | — |  | — |  | 10 |  | 27 |  | 37
Disposals/retirements |  | — |  | (180) |  | — |  | (12) |  | — |  | (1) |  | (193)
Acquisition of companies and businesses1 |  | 3,352 |  | 779 |  | 1,292 |  | 23 |  | — |  | 11 |  | 5,457
Hyperinflationary adjustment |  | 14 |  | 3 |  | — |  | 1 |  | — |  | — |  | 18
Disposal of companies and businesses |  | (1) |  | — |  | — |  | — |  | — |  | — |  | (1)
At 31 December 2022 |  | 5,181 |  | 1,473 |  | 1,185 |  | 81 |  | 55 |  | 206 |  | 8,181
Accumulated amortisation and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 1 January 2021 |  | (45) |  | (585) |  | — |  | (47) |  | (27) |  | (102) |  | (806)
Exchange differences |  | 1 |  | 10 |  | — |  | — |  | — |  | 1 |  | 12
Disposals/retirements |  | — |  | 4 |  | — |  | 4 |  | — |  | 1 |  | 9
Impairment charge |  | — |  | — |  | — |  | — |  | — |  | (2) |  | (2)
Amortisation charge |  | — |  | (64) |  | — |  | (5) |  | (5) |  | (15) |  | (89)
At 31 December 2021 |  | (44) |  | (635) |  | — |  | (48) |  | (32) |  | (117) |  | (876)
At 1 January 2022 |  | (44) |  | (635) |  | — |  | (48) |  | (32) |  | (117) |  | (876)
Exchange differences |  | 1 |  | (31) |  | — |  | (2) |  | — |  | (5) |  | (37)
Disposals/retirements |  | — |  | 179 |  | — |  | 12 |  | — |  | 1 |  | 192
Hyperinflationary adjustment | ​ | — | ​ | (1) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | (1)
Impairment charge |  | (22) |  | — |  | — |  | — |  | — |  | — |  | (22)
Amortisation charge |  | — |  | (85) |  | — |  | (6) |  | (5) |  | (22) |  | (118)
At 31 December 2022 |  | (65) |  | (573) |  | — |  | (44) |  | (37) |  | (143) |  | (862)
Net book value |  |  |  |  |  |  |  |  |  |  |  |  |  |
At 1 January 2021 |  | 1,608 |  | 239 |  | — |  | 19 |  | 13 |  | 43 |  | 1,922
At 31 December 2021 |  | 1,844 |  | 241 |  | — |  | 19 |  | 14 |  | 46 |  | 2,164
At 31 December 2022 |  | 5,116 |  | 900 |  | 1,185 |  | 37 |  | 18 |  | 63 |  | 7,319
1. | Includes current-year acquisitions of £5,449m (2021: £301m) as well as adjustments to prior-year acquisitions within the measurement period.
Summary of estimated useful economic lives of intangible assets | ​
​ | ​ | ​
Customer lists: |  | 3 to 15 years
Other intangibles: | ​ | 2 to 15 years
Product development: | ​ | 2 to 5 years
Computer software: | ​ | 3 to 5 years
​
Summary of breakdown of goodwill by region | ​
​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
​ | ​ | £m | ​ | £m
North America1 |  | 4,527 |  | 1,414
Europe (incl. LATAM) |  | 241 |  | 109
UK & Sub-Saharan Africa |  | 66 |  | 66
Asia & MENAT |  | 196 |  | 178
Pacific |  | 86 |  | 77
Total |  | 5,116 |  | 1,844
1. | Includes £2,878m (2021: £nil) relating to the US Terminix CGU and £1,555m (2021: £1,100m) relating to the US Pest Control CGU.
Summary of key assumptions used by individual CGUs for value-in-use calculation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 long-term |  | 2022 pre-tax |  | 2021 long-term |  | 2021 pre-tax |
​ | ​ | growth rate1 | ​ | discount rate | ​ | growth rate1 | ​ | discount rate |
North America2 |  | 2.0 | % | 8.4 – 10.3 | % | 2.0 – 2.2 | % | 6.6 – 8.7 | %
Europe (incl. LATAM) |  | 1.3 – 3.0 | % | 6.7 – 15.4 | % | 1.3 – 3.3 | % | 7.1 – 15.4 | %
UK & Sub-Saharan Africa |  | 2.0 – 4.5 | % | 8.0 – 12.3 | % | 2.0 – 4.5 | % | 6.5 – 11.6 | %
Asia & MENAT |  | 1.5–4.0 | % | 9.7 – 13.9 | % | 1.5 – 4.0 | % | 8.2 – 12.6 | %
Pacific |  | 2.0–2.5 | % | 10.2 – 11.0 | % | 2.2 – 2.4 | % | 9.3 – 10.7 | %
1. | Source: imf.org.
2. | Key assumptions used by the US Pest Control CGU were a long-term growth rate of 2.0% (2021: 2.2%) and a pre-tax discount rate of 10.3% (2021: 7.7%). For US Pest Control CGU the recoverable amount exceeds the carrying amount by £1,692m (2021: £2,121m).

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