From QR's web-site, for a late June 2014 travel date:
QR003 (A388) F DOH-LHR = QAR21,020 First Flexible (no First semi-Flexible available on this particular flight) - approximate equivalent
GBP3,420.
CAI-DOH-LHR (including QR003 F) = EGP13,559 (First semi-Flexible) - approximate equivalent
GBP1,150.
So, for one-third of the ex-DOH price you can sample QR's A388 F cabin by flying ex-CAI. Forget award travel; just get yourself to CAI.