The British concept was simple and forceful: battlecruisers would answer a detected German sortie, engage the scouting force, and keep contact while the Grand Fleet followed. If confronted by the High Seas Fleet, they would use their superior speed to retire onto Jellicoe's battleships. The plan's critical requirement was accurate communication of position and circumstances from the battlecruisers to the Grand Fleet, either through relayed radio or a low-power chain of cruisers. Without that link, the supporting battle fleet could not reliably arrive where it was needed.
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The British plan depended on communications
British battlecruisers would find and hold the German scouts, then withdraw toward the Grand Fleet if they met superior strength.