blockade of Cadiz 

Dear sir. Thank you for asking me first. 
Naval blockades are just "blockades" and cannot be described as "battles", because they're not. This article refers to the assault on the city by Nelson's amphibious forces. After having failed to bombard the town, Nelson was dispatched on the even more disatrous Santa Cruz expedition, later in the month. The blockade effectively went on, but St. Vincent withdrew the main fleet to the Tagus in the atumn, keeping a squadron of observation cruising off Cadiz during the winter...

The name "Assault on Cadiz" instead "Blockade of Cadiz" gives this engagement a more accurate and specific name, because a maritime blockade is not a sea battle. Another article could be "the blockade of cadiz!", where you could write every feat of arms that occurred from 1797 until 1798-1802, but as the blockade of cadiz is not a "campaign", it has no sense to even think about it.

Greetings