British Latin

British Latin or British Vulgar Latin was the Vulgar Latin spoken in Great Britain in the Roman and sub-Roman periods. While Britain formed part of the Roman Empire, Latin became the principal language of the elite, especially in the more romanized south and east of the island. However, in the less romanized north and west it never substantially replaced the Brittonic language of the indigenous Britons. In recent years, scholars have debated the extent to which British Latin was distinguishable from its continental counterparts, which developed into the Romance languages.

After the end of Roman rule, Latin was displaced as a spoken language by Old English in most of what became England during the Anglo-Saxon settlement of the fifth and sixth centuries. It survived in the remaining Celtic regions of western Britain but died out in those regions too by about 700, when it was replaced by the local Brittonic languages.

source: https://en.wikipedia.org/wiki/British_Latin