Standard track Sierra Mike was the usual BAW1 or BAW3 oceanic clearance. However, if there was something preventing it (conflicting with AFR Concorde, or airspace closure/military exercise), we used to have to read out the latitude, longitude, flight level and sometimes speed for each oceanic waypoint, of which there were at least eight.....not good when the frequency is going like the clappers already, and you know from talking to Sector 23 Bristol that it's going to be a non-standard one, when you hear "Good morning Delivery, Speedbird Concorde One is half an hour to start, requesting Oceanic Clearance......."
Hey, Supervisor, I must be next for a break!