London
There are many accents traditionally associated with London. The most well known of the London accents long ago acquired the Cockney label from London's East End, which is heard both in London itself, and across the wider South East England region more generally. The accent of a 21st-century Londoner varies widely; what is becoming more and more common amongst the under-30s however is some fusion of Cockney with a whole array of ethnic accents, in particular Caribbean, which form an accent labelled Multicultural London English (MLE). The other widely heard and spoken accent is RP (Received Pronunciation) in various forms, which can often be heard in the media and many of other traditional professions and beyond, although this accent is not limited to London and South East England, and can also be heard selectively throughout the whole UK amongst certain social groupings. Since the turn of the century the Cockney dialect is less common in the East End and has 'migrated' east to Havering and the county of Essex.
Gillian Anderson
Anderson is bidialectal. With her English accent and background, she was mocked and felt out of place as a teenager in the American Midwest and soon adopted a Midwestern accent. To this day, she easily shifts between her American and English accents. In May 2013, during an interview with BlogTalkRadio, Anderson addressed the matter of her national identity: "I've been asked whether I feel more like a Brit than an American and I don't know what the answer to that question is. I know that I feel that London is home and I'm very happy with that as my home. I love London as a city and I feel very comfortable there. In terms of identity, I'm still a bit baffled."