Well, it was a long time ago! The old runway at Safi is now underneath 32/14 at Luqa (which used to be the short runway). I think the Safi hangars are still there.
Hal Far was Fleet Air Arm territory. As a result of the dispersal policy made necessary during the Siege of Malta in WWII, I believe it was possible to taxi an aircraft from Luqa to Safi and down to Hal Far. I presume that it was also possible to taxi up to Takali (Ta'Qali) which now has a splendid museum.
The Maltese airfield that doesn't get much mention is Siggiewi which is on top of the cliffs on the west coast and just off the end of Luqa if you take off on runway 24. I seem to remember that it was a signals unit in my day.
Does anyone know what went on there during WWII?