 By this time Formidable's air group had a strength of 36 Corsairs and 18 Avengers. She arrived in San Pedro Bay in the Philippines on 4 April to await the return of the BPF from their efforts to neutralise airfields on the Sakishima Islands, between Okinawa and Formosa, as part of the preparations for the landings on Okinawa. Formidable was called forward six days later to join the 1st Aircraft Carrier Squadron (1st ACS) of the BPF on operations as a replacement for Illustrious which was in poor mechanical shape. She arrived on 14 April and contributed aircraft when the attacks recommenced two days later. The commander of 1842 Squadron was killed on the first day of operations while strafing buildings at Nobara airfield. After refuelling and two more days' attacks, the BPF sailed on 20 April for San Pedro Bay to replenish its ships for further operations.
