How an Allied Italy would transform the Mediterranean

What changes if Fascist Italy joins the Allies rather than the Axis?

The Mediterranean becomes far safer for Allied shipping and the Italian fleet frees British strength for other theatres.

As a British and French ally, Italy's fleet and geography would remove the central Mediterranean burden from both powers. Italian pressure through Austria or southern Germany might even strengthen French resolve after the 1940 campaign. The Mediterranean would become a secure route for convoys between Britain, the empire, and the Far East. Italian squadrons could help contain German surface raiders, releasing British battleships for the Pacific. Ships damaged or sunk in the historical Mediterranean campaign, including carriers and modernized battleships, would remain available for other theatres.