I found this older and interesting article at Sunday Mail about Eve and her various accents. It turns out that she is half Welsh and half Scottish and can easily change accents in an instant.
TV Timelord David Tennant grew up in Paisley, Captain Jack actor John Barrowman was eight before his family moved from Glasgow to America, and award-winning Welsh star Eve Myles – who plays Gwen – is half Scots and can lapse into her Govan-raised dad’s accent in an instant.
She said: “My dad is from Glasgow and I have lots of family in Glasgow so I’m half Welsh and half Scottish and very proud of that. I can do a mean Glasgow accent.”
I thought I could hear a slight Scottish accent in her voice. 😉 The article also has her discussing ‘Torchwood’ and its challenges.
The full article can be found archived here.