Hello,
Ludovico Slongo and mine "Desert Prelude: Early clashes" (
http://mmpbooks.biz/mmp/books.php?book_id=119) includes some info on this.
On 20/21 June, 190a Squadriglia B.M., 86o Gruppo B.M., arrived to Stagnone from Brindisi with its CANT Z.506s and started operation with a raid to Bizerta made with all its six combat ready aircraft. AA was extremely severe, the bomber of Maggiore Marini, the Gruppo commander was hit while Z.506 MM45254 went down for unknown reasons; Tenente De Lauzières de Themines Flotatd and his four crewmembers was killed.
Six SM 79s from the 36o Stormo attacked Bizerta during the night. AA seriously damaged Tenente Sacchetti’s bomber.
Unfortunately, I don't have any name on the sub on 22 June.
The Cant on 24 June, came from
199a Squadriglia. This was the last encounter of the campaign.
Best wishes/Håkan