Patricia Fletcher is a New York-based voice-over and dialect coach explains how to speak with a proper British accent.
The first thing we need to do to find that dialect is to sit up and forward in our chairs. The sound is going to come to the front of our mouth. Our tongue is going to move forward. It is going to be much easier for us to speak clearly and crisply as is required of this dialect. If we sit back in the chair we can hear what happens to the tongue… goes back in the mouth and that is a great place to go if we want to do a working class dialect.