I have been studying English for many years, focusing on British accent. Apart from my books with DVDs in British, I listen to different podcasts of BBC learning English. Sometimes, I shadow the speaker to repeat it with the same pace and intonation. However, I assume that while I speak, my intonation is not good enough perhaps because we dont have much rising or falling in our language.
I have noticed that there are lots of great books, DVDs, websites with the title "American accent training", which are not merely about pronunciation, but also about intonation and everything. However, I could not find such a comprehensive thing about British accent. Could you please recommend some ways, books, and stuff to improve my accent?