A bit of UK native plant history
In Great Britain most native plants arrived following the last ice age, which ended in around 9,500 BC. As glaciers retreated and sea levels rose, an expanse of low, marshy land was left. ‘Doggerland’ formed a land-bridge between continental Europe and what is now Britain. Plants, people and animals migrated across Doggerland, until it eventually disappeared underwater to leave Britain isolated. It is mostly the plants which populated Britain before it became an island, that we now consider UK native species.
The history of Ireland’s native flora is connected to that of Britain’s. It is thought that around 10,000 years ago, when sea levels were still more than 250 feet lower than they are today a land bridge between the East coast of Ireland and Wales may have existed. Plants would have been able to migrate across this strip until roughly 7,500 years ago, when it would have disappeared underwater.