Over the last 50 years or so, we have seen an increasing cultural diversification across the country. Accents are a reflection of society, and as society changes, so accents change.

Of all the mediums that influence language, I think film is the one that has the most effect. Not so much from the point of view of pronunciation and grammar. I don't think we pick up very many sounds and grammatical instructions from the films we see - but the catchphrases.

In Cardiff, I've heard a number of accent mixes that weren't previously heard before such as Cardiff-Arabic and Cardiff-Hindi. This pattern is repeating itself in many urban communities across the U.K.; people are especially keen to develop a strong sense of local identity.

David Crystal Quotes