Sorry if duplication crap online I'm an old veteran. I want to apply for DTV on medical grounds due to heart disease. Have been told I have to fly Bangkok for a doctor's appointment letter and fly back to apply for the visa? My plan is get the visa then visit hospitals for best cost and treatment. I have a family to stay with as I will come and go over a period of treatments. My second question is will a British home doctor letter outlining my condition be OK for the application. Thank you in advance, please no wise cracks as this is a genuine enquiry.