This steak should NOT be burnt on the outside. While there is not the faintest hint of pink in the middle, it should be browned through, not burnt through. This steak should feel solid to the touch.
A Well Done steak is the hardest to cook. The secret is to do it low and slow. It's the only way to prevent burning while fully cooking it through the middle. Grill this steak over a medium heat between 10 and 12 minutes per side.
Most people will tell you that this is the steak for people who don't like steak. While there is some truth to that, it is a popular request so, any good griller needs to know how to do it.