Research and analysis
H1: Cumulative net total number of invasive non-native species established across or along 10% or more of the land area or coastline of Great Britain, 1969 to 2023
Updated 1 December 2025
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| year | environment | value |
|---|---|---|
| 1969 | Freshwater | 4 |
| 1969 | Marine (coastal) | 2 |
| 1969 | Terrestrial | 28 |
| 1979 | Freshwater | 6 |
| 1979 | Marine (coastal) | 5 |
| 1979 | Terrestrial | 37 |
| 1989 | Freshwater | 11 |
| 1989 | Marine (coastal) | 11 |
| 1989 | Terrestrial | 45 |
| 1999 | Freshwater | 12 |
| 1999 | Marine (coastal) | 14 |
| 1999 | Terrestrial | 51 |
| 2009 | Freshwater | 12 |
| 2009 | Marine (coastal) | 24 |
| 2009 | Terrestrial | 57 |
| 2019 | Freshwater | 13 |
| 2019 | Marine (coastal) | 29 |
| 2019 | Terrestrial | 60 |
| 2023 | Freshwater | 14 |
| 2023 | Marine (coastal) | 30 |
| 2023 | Terrestrial | 64 |