They are scones. Savoury scones.

Biscuit literally means twice cooked, from the French, originally from Latin. A biscuit is first baked, then dried. These scones are cooked but once.

What's really weird is that the dish originated in the British Channel Island of Guernsey, where a lot of people speak French (it is close to France than England), most of their roads are French, and they have their own French dialect. And yet they cooked something once and called it a biscuit.