Olivia Colman, does a great line in being a typically batty English woman, the female Hugh Grant maybe. I'm sure she is lovely in real life and has appeared in quite a few good comedies. One bizarre one I liked is called "Flowers" and for people a bit younger than me she also played a character in Peep Show, a big hit with students at the time. Olivia is also in one of my favourite films with Simon Pegg & Nick Frost called Hot Fuzz. She was also in a recent adaptation of Les Miserables for the BBC which appeared to be cast totally colour blind which was excellent.
Not all English people talk like Olivia some of us are more like Daphne from Fraser