By daybreak on 23 February, the rear of the British fleet was separated by a considerable distance from the van and centre. Mathews signalled for Lestock to make more sail, reluctant to start the attack with his ships still disorganised, but the slowness of Lestock to respond caused the Franco-Spanish force to start to slip away to the south. Mathews feared that they would escape him and pass through the Strait of Gibraltar to join the French force gathered at Brest for the planned invasion of Britain.