What supplied British blockade fleets in the Napoleonic Wars

Did Napoleonic-era British fleets use supply ships as later fleets did?

Yes; supply vessels carried stores and some ammunition, but food was their most important recurring cargo.

The Royal Navy could not keep ships on distant blockade stations through local endurance alone. Supply vessels brought food, ammunition, and other stores out to the fleet. Food was the most persistent volume requirement because large crews had to be fed continuously. Operational blockade endurance depended on the logistics network behind the ships.