My sisters and I were brought up to speak received English by my English mother, who was extremely strict about how we spoke. Admittedly from time to time I would put on my home island's accent just to wind her up. But to give Mother here due it has stood me in good stead over the years, especially when public speaking, of which I have done quite a lot the past. I get irritated when people say 'haitch', instead of 'aitch'.