If you are a frequent flyer on British Airways, you are a VIP and with your premier status the personnel and crew members anticipate your arrival and are prepared to treat you like the special passenger you are. After all you have earned it by giving them your business.
British Airways has introduced a more personal face place and unconventional approach to assist in recognizing their most valued customers by allowing crew members to Google them for their images to be better able to recognize who they are. This is aided by an onboard personalized I-pad given to crew by the company.
Based on the information you have provided with the company, crew members can identify your preference to better assist you during your flight and travels.
So as soon as you board, they know who you are.