Originally Posted by Dave_C
When the results are shown, it goes from Busines to Economy [..] I suspect it's a limitation of the underlying booking engine
It is indeed a limitation of the ITN engine. However, it appears that:
- First Class is shown (e.g. BA92 YYZ-LHR includes F/A availability).
- Using ITN/UA access method will bring up additional Y-subclasses (e.g. V/N/L/S/Q/O) not shown when using ITN/AX.