Have you booked yet or just checking out options? In my experience your PPS status may clear a waitlist. Look for flights with plenty of availability in the higher business booking classes - from the info you posted it looks like 308 and 320 to LHR are the best options (the others mostly zeroed C0 J0 D0). It may take several days to clear a waitlist. You can check with your PPS coordinator on progress/likelihood of it clearing.

Otherwise can you change dates? Friday through Monday are the busiest days for business travel. February can be very busy since all back after christmas break (and summer break in Australia/NZ). Plus of course it is only a week before lunar new year.