Dear Sir or Madam I am a native English speaker, born in Manchester, UK. I have semi-retired after working for over fifteen years as an English teacher, and have proofreading and editing qualifications. I can work in both US and UK English formats. I have a system of quality control that includes; first proofreading and editing with Grammarly, adding comments and changes using Track the Changes in word. Finally, I review the final final version of the text, then send the document with the original version, the original marked up and the final version. Best regards William Harrison MSc Ed Lead, BSc Hons, Diploma in Proofreading and Editing