Warspite joined the 2nd Battle Squadron of the Grand Fleet following a number of acceptance trials, including gunnery trials, which saw Churchill present when she fired her 15 inch (381 mm) guns.
Warspite dimasukkan ke dalam Skuadron tempur ke-2 dari Grand Fleet yang melewati sejumlah tes penerimaan, seperti tes menembak, dimana Churchill hadir ketika Ia menembakkan meriam 15 inch (381 mm)-nya.