Ba spent six months at West Ham in 2011, but left to join Newcastle following their relegation.

And having unsuccessfully tried to lure the Senegal international back on numerous occasions - most recently this summer - Allardyce is making a final play to land the striker.

West Ham are poised to make Chelsea a loan offer for Ba, with the 28-year-old now third-choice striker at Stamford Bridge behind Fernando Torres and Samuel Eto'o.