She was subsequently added to the Royal Navy as HMS Brev Drageren, and was involved in two notable actions while in British service.

[8] On 24 August 1809, Patriot, was in company with the schooner Paz, the gun-vessel Jahde, and two boats detached from Brev Drageren and Censor.

[10] On 31 July 1811, Brev Drageren and Algerine were cruising together in Long Sound, Norway, when they encountered and engaged three Danish brigs, Lolland, under the command of Captain Hans Peter Holm, and Kiel and Lougen.

[12] In the second day's fight, Algerine sent a boat and sweeps to Brev Drageren, which helped her escape the Danes, though not until after her crew had rowed for 30 hours.

One capture was of a French privateer lugger and another was an armed customs-house vessel that Brev Drageren cut out from Delfzijl at the mouth of the river Ems.

[e] On 14 March 1813 Lieutenant Francis Banks, of the gun-brig Blazer, who commanded the small British force stationed off the island of Heligoland, received information that the Russian Army had entered Hamburg and that the French at Cuxhaven were in some distress.

[14] The next day, by invitation from the shore, Banks landed with 32 troops that he had embarked at Heligoland and took possession of the batteries of Cuxhaven.

On 17 March he agreed a treaty with the civil authorities that the British flag should be hoisted in conjunction with the colours of Hamburg.

[14] Brev Drageren and Blazer shared in the prize money for the Ever Pascal, Deux Freres, Vrow Elizabeth, and stores at Cuxhaven and St. Cricq that they captured on 17 March.

Devon boarded the gunboat in the smoke of her second broadside, and possibly the explosion of some cartridges on her deck, and captured her.

[19] Admiral Young, the commander-in-chief of the British navy in the area, wrote to Devon, asking him to convey to his men the Admiralty's approbations of their conduct.

The other two went to Thomas Davies, then Assistant Surgeon of Brev Drageren and James Whiteman, then a Private in the Royal Marines, stationed on Blazer.

[14] Then on 10 July 1813 Brev Drageren was part of a squadron that captured eight small vessels in the Elbe and Weser.

The squadron included Desiree, Calliope, Shamrock, Thrasher, the hired armed cutter Princess Augusta, and gunboats.

[i] In October 1813 Captain Arthur Farquhar, of the 18-pounder 36-gun frigate Desiree, arrived at Heligoland to assume command of the British naval forces there, including Brev Drageren.

[j] Devon came into conflict with the Prussian authorities when he prevented them from seizing spars in the custody of a British government agent.