Malta in August 1941, after being reinforced

The primary goal of the Substance and Style convoys was to increase the strength on the island. The Official History says that there were now 22,000 in the garrison. This is a summary:

13 battalions
112 heavy AA guns
118 light AA guns
104 pieces of artillery (light, field, and medium)

aircraft:

15 Hurricane I
60 Hurricane II

In August, a night fighter was formed with 12 Hurricane IIs, and this seems to have reduced the frequency of night raids. This is based on the account in Vol.II of the Official History.