An earlier loss of Tirpitz could release the Home Fleet

What changes if Tirpitz is sunk in September 1944 and the Home Fleet can move toward the Pacific two months earlier?

The gain is real but modest in late 1944; sinking Tirpitz a year earlier would free British strength at a more consequential moment.

Removing Tirpitz reduces the need to hold heavy ships in northern waters, so the Royal Navy could begin transferring forces as soon as she was gone. A September 1944 sinking provides only a two-month head start over the historical date and therefore offers limited strategic benefit. A September 1943 loss, just as Italy leaves the war, releases ships and crews at a more useful point. Scharnhorst remains a threat, though she is treated as less dangerous, and Renown might be enough to watch her. The earlier date leaves more time to assemble and prepare the British Pacific Fleet.