It seems like you’ve presented a fictional scenario, as mermaids are mythical creatures and not real beings. Mermaids are often depicted in folklore and mythology as beings with the upper body of a human and the lower body of a fish.
While tales of mermaids have captured human imagination for centuries, there is no scientific evidence to support their existence.
If this were a real event, it would likely be a hoax or a creative piece of storytelling. The idea of a 200-year-old mermaid drifting to the British coast would be an extraordinary and fantastical occurrence. In reality, marine animals, such as manatees or dugongs, have occasionally been mistaken for mermaids in historical accounts.
Remember to critically assess such claims and consider the context before accepting them as true, especially when dealing with extraordinary or mythical elements.
archaeology