 Complete the following phrase:  By October the Luftwaffe had reinforced Fliegerkorps II, and a new round of heavy raids began, using new low-level or shallow dive-bombing tactics, mainly against the airfields and the RN submarine base. These used Ju88s escorted by a variety of German and Italian fighters, with Bf 109s, Macchi C.202 Folgores and Fiat CR.42 Falco biplanes operating as Fighter-bombers. However, these attacks also lost heavily to the AA guns and RAF fighters, despite the increasing shortages of food and supplies on the island. At last, in November Welshman and her sister ship HMS Manxman appeared, followed by a supply convoy. With the Axis defeat at 