As the others have said, it's a no.
If you go through the booking process, at one stage there is a very prominent message popping up indicating that the extra allowances for Sapphire/Emerald do not apply, and giving you the choice to continue or to return to select another fare.
That said, if you turn the booking into a BA holidays booking (by adding a hotel or car later in the booking process) or receive and accept a POUG (proactive online upgrade offer to Club Europe) you will have the regular baggage allowance again.