When a TV show is set in an alternate universe, sometimes I wonder if its characters from that dimension can be found in the main Toobworld. Finding the same actor, that's the easy part. It would be nice if their character in one universe or another is never named, although that's not such a difficult obstacle to overcome. And as for their occupations and even their personalities being different can be easily splained away by the change in circumstances between the two dimensions.
So this week I saw the finale (season? series?) of 'Gavin & Stacey', and found a character who might be found in an alternate dimension from 'Doctor Who'. In both, the characters were played by Helen Griffin. (Same name as me own Nana - and she kind of looks like my Auntie Anne - so of course she came to my notice!)
While racing to get Smithie to Barry Island so that he could be there for the birth of his baby by Nessa, Gavin tangled with an obstinate toll booth collector. She wouldn't let them cross into Wales because they didn't have the full amount for the toll - and all they were missing was 10p!
She's only named in the credits as "Rita", her name never comes up in the dialogue. Toobworld Central has had to rule on this in the past and the decision always comes down in favor of the dialogue, which is part of the inner reality; the credits are not.
In the 'Doctor Who' two-parter "The Age Of Steel" & "Rise Of The Cybermen", she is known as Mrs. Moore, but her real name is Angela Price. Since her name is never brought up officially in the 'Gavin & Stacey' episode, we could make the claim that they were one and the same.
And even if Ruth Jones and James Corden showed up at Toobworld Central to insist that her name MUST be "Rita", no worries. I'll just say that the difference is due to the way each of them was raised in their respective dimensions.