If you are travelling from JFK to London on BA116 (only), from 4 to 25 March, you will be leaving from American’s Terminal 8.
This appears due to building works at the BA terminal.
BA advise -
If you are elible to use a lounge, we will give you a voucher which can be exchanged in the Admirals lounge for food and drinks from the bar menu. A selection of food and drinks is already complimentary in the Flagship Lounge.
The BA116 will be also be offering a full meal service.
So be sure to ask.
Check-in opens 3 hours before departure and closes 1 hour before departure. Bags are to be checked-in at Terminal 8.