There is no single definitive date for the origins of BSL, but it's believed to have developed:
* From the 16th century: The first known references to sign language in Britain appear around this time, suggesting it was already in use.
* Through interactions between deaf communities: BSL developed within deaf communities, evolving through their own natural communication methods.
* With influences from other sign languages: BSL is influenced by other European sign languages, particularly French Sign Language.
Therefore, rather than an invention date, BSL has a history of gradual development and adaptation, with its roots firmly planted in the deaf community of Britain.