Do you consider the Cornish to be English, or a separate ethnicity?

[Alcuin52]

No.

[Septentrion]

The notion of Cornish as a separate ethnicity is based on the (false) notion that the English are purely or mostly Anglo-Saxon and that the Cornish are purely Brittonic and basically Welsh.

But now that it is known that English people are also of Celtic origins and, in some parts, mixed with varying degrees of Anglo-Saxon, do you still consider the Cornish a separate ethnicity?

Oh come on! The Cornish are obviously English by all means. They might be the most "Celtic" people of England, but are more English than the vast majority of the Celtic Fringe peoples. In fact, Cornwall was part of the Wessex kingdom.