ChrisN;
The following is the first para on page 73 of BEA's Interim Report No.3 :-
A little after 1 h 52, the turbulence stopped. The copilot drew the Captain’s attention to the value of REC MAX, which then reached FL 375. The Captain made no comment and, a few moments later, he woke the second copilot, said he was taking his place, and asked the copilot in the right seat if he had a commercial pilot license. He thus ensured that he was qualified to act as relief and implicitly designated him as relief pilot. This question to the copilot probably meant that the issue of the relief pilot for the Captain had not been raised during the briefing before the flight.