I think the Extra Mile comes as standard, not as an option.
I'm English and live in beautiful, historic Lincoln, U.K.
I'm educated to BA(Hons) degree level and have an exhaustive grasp of both U.S. and U.K. English grammar, punctuation, and spelling. Most of my work to date has been ghostwritten.
I've a demonic eye for detail and, as a professional proofreader and editor as well as a writer, my copy goes out clean and ready to use.
I enjoy the in-depth research for a piece of work almost more than writing it and can, therefore, write authoritatively and accurately on a huge variety of topics. Any tone or voice you prefer is no problem for me.
I'm looking forward to working with you!