The Slave Trade was outlawed in 1807, isn't the series set in 1814?

"The African Slave Trade, and all manner of dealing and trading in the Purchase, Sale, Barter, or Transfer of Slaves, or of Persons intended to be sold, transferred, used, or dealt with as Slaves, practised or carried on, in, at, to or from any Part of the Coast or Countries of Africa, shall be, and the same is hereby utterly abolished, prohibited, and declared to be unlawful."

Text from the 1807 abolition of the Slave Trade Act. It goes on for quite a lot longer and closes just about every conceivable loop hole. In 1815 the Congress of Vienna also declared the eventual abolition of the Slave Trade across all nations, and Britain was also coercing over states into abolition, such as Portugal. It's unlikely a British trade continued, given they'd be flouting the law, and in subsequent acts be punished as pirates.

The role of the EIC in the show is a little odd, as they seem to be stamping on other people's monopolies, like that of the Africa Company of Merchants and Hudson's Bay. The EIC did do the triangle route, but not in the 19th century (it was illegal). EIC would more likely focus on East Africa as opposed to West.

EIC influence and also that of the Americans (fictional blockade) is quite overstated. I wonder what exactly parliament was doing in the show?

EDIT: hmm I think the ship in the show was from 1804... this is where it gets a bit odd. Can't really help there, I have only really looked at the post 1807 to 1860 landscape in any detail. I can tell you I didn't encounter any sort of legislation outlawing the trade from 1804, though an attempt was made in 1805, but this failed. There were several acts to regulate the transport of slaves before 1804, but I can't recall anything, at least from the British government which stated the EIC was prohibited from dealing in slaves. As for internal EIC documents I have no idea. Given the last EIC voyage was in the early 1790's slave trading may have been viewed as a bit scandalous, particularly that any sort of justification for it had effectively been removed by the Enlightenment and Britain's own propaganda (the "civilising" mission thing, often by force) but as far as I can work out, not illegal.