In US sitcoms like "Seinfeld", "Friends", "Frasier" and so on, British characters always say things like "Bloody Hell!" just to emphasise that they are British, (even though their accents usually sound Australian to British ears!) In one episode of "Seinfeld", the characters were trying to see who could sound most British by saying, "Not Bloody likely!" in what they thought were Cockney accents.