Small Roman figure with Celtic features

Small Roman copper alloy figurine with Celtic facial features and hairstyle.
Roman bound copper alloy figurine found with a metal detector near Fullerton, Wervell, Hampshire. A small figurine of a bound and tethered captive with Celtic facial features and hairstyle. The object is perforated for hanging. Presumably it has something to do with the slave trade. Second or third century AD, Roman.