Short answers, pulled from the story.
The Home Fleet was officially formed on the 1st of October 1902 when Vice-Admiral Gerard Noel received his appointment as Commander-in-Chief. This new force consisted of four Port Guard ships withdrawn from scattered dockyards to form a unified command based at Portland.
Admiral Sir Charles Forbes commanded the fleet starting in April 1938 with operations centered at Scapa Flow. Subsequent commanders included Admiral Sir John Tovey, Admiral Sir Bruce Fraser, and Admiral Sir Henry Moore who served until November 1945 while protecting convoys like JW55B.
All remaining squadrons in the Home Fleet were disbanded in December 1966 before being amalgamated with the Mediterranean Fleet in 1967. The unit was redesignated as the Western Fleet following this merger which ended its operation from United Kingdom territorial waters since 1902.
The Channel Fleet was re-styled the Atlantic Fleet on the 14th of December 1904 while the original Home Fleet became the new Channel Fleet. A new Home Fleet was subsequently reformed in 1907 under Vice-Admiral Francis Bridgeman to replace the renamed force.
The nucleus of the Home Fleet consisted of four Port Guard ships withdrawn from scattered dockyards to form a unified sea-going command based at Portland. Rear-Admiral George Atkinson-Willes served as Second-in-Command with his flag in the battleship HMS Empress of India during this initial period.