There is the Malta War Diary blog, that is built using official sources. March 1941 is here:
https://maltagc70.wordpress.com/cate...41/march-1941/
It lists following attacks on Sunderlands in St Paul's Bay:
_ 5th, two attacks, a Sunderland hit, unserviceable for some days
_ 7th, a Sunderland strafed, a gunner killed
_ 10th, "nine Bf 110s in 2 formations" strafed St Paul's Bay, One Sunderland burned out and two damaged