Lots of them in the late 50s into 60s. Several civil 707s landed at Changi(RAF) for Paya Lebar(Civ) R/Ws 20 at both airfields about 4 miles apart. Also RAF Comet 2 landed at Takali instead of Luqa on a line check by the boss of the Transport Examinimg Unit.
Neither Capt or Examiner aware until after landing!