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Intangible assets - Key assumptions used by individual CGUs for value-in-use calculations (Details) - GBP (£) £ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
North America |  |
Intangible assets |  |
Long-term growth rate | 2.00% |
North America | US Pest Control |  |
Intangible assets |  |
Long-term growth rate | 2.00% | 2.20%
Pre-tax discount rate | 10.30% | 7.70%
Headroom amount | £ 1,692 | £ 2,121
North America | Minimum |  |
Intangible assets |  |
Long-term growth rate |  | 2.00%
Pre-tax discount rate | 8.40% | 6.60%
North America | Maximum |  |
Intangible assets |  |
Long-term growth rate |  | 2.20%
Pre-tax discount rate | 10.30% | 8.70%
Europe | Minimum |  |
Intangible assets |  |
Long-term growth rate | 1.30% | 1.30%
Pre-tax discount rate | 6.70% | 7.10%
Europe | Maximum |  |
Intangible assets |  |
Long-term growth rate | 3.00% | 3.30%
Pre-tax discount rate | 15.40% | 15.40%
UK & Sub Saharan Africa | Minimum |  |
Intangible assets |  |
Long-term growth rate | 2.00% | 2.00%
Pre-tax discount rate | 8.00% | 6.50%
UK & Sub Saharan Africa | Maximum |  |
Intangible assets |  |
Long-term growth rate | 4.50% | 4.50%
Pre-tax discount rate | 12.30% | 11.60%
Asia & MENAT | Minimum |  |
Intangible assets |  |
Long-term growth rate | 1.50% | 1.50%
Pre-tax discount rate | 9.70% | 8.20%
Asia & MENAT | Maximum |  |
Intangible assets |  |
Long-term growth rate | 4.00% | 4.00%
Pre-tax discount rate | 13.90% | 12.60%
Pacific | Minimum |  |
Intangible assets |  |
Long-term growth rate | 2.00% | 2.20%
Pre-tax discount rate | 10.20% | 9.30%
Pacific | Maximum |  |
Intangible assets |  |
Long-term growth rate | 2.50% | 2.40%
Pre-tax discount rate | 11.00% | 10.70%

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