1. Go to the front page.
2. Select your route, date, and Business/First class option
3. On the booking page, select your fare (often called Royal Silk Saver Advantage if not select anything with lowest price for Business Class)
4. IMPORTANT: Click on FARE BASIS INFORMATION (last grey) button, look for fare basis code on the table.
5. BOTH flights (if round-trip booked) must have fare basis beginning with "J", such as "JRLE6THE". Not "C" or "D".
6. Look at the column of the fare you have selected (that shows J as the first letter), see what it tells you how many seats left, and there are 2 cases.
6.1 If there is nothing written: 9 or more seats left.
6.2 Something is written there: it will tell you how many seat left (less than 9) for that fare.