Hi Chris,
Here's what I could find.
1-4 March 1941: none
5 March 1941: 76 bombers and Stukas operated against Halfar airfield between 15:50 and 17:40 in three waves.
6 March 1941: 9 Stukas against La Valletta harbour between 20:20 and 20:25.
7 March 1941: 11 Stukas against La Valletta harbour between 21:00 and 21:30.
8-12 March 1941: none
Cheers,
Andrew A.
Air War Publications -
www.airwarpublications.com