Around sixty-five F.B.19s were built. Six early production examples were sent to France in late 1916 for operational evaluation, where the RAF found them unsuitable for the fighting conditions then evolving. Twelve Mk IIs went to the Middle East, five to Palestine and seven to Macedonia; no squadron was fully equipped with the type. They were not popular. A few Mk IIs served as trainers and for air defense over London, but the type had effectively been retired before the end of 1917.