The final installment of historian David Olusoga’s documentary series examines the Royal Navy’s transformation following the passage of the 1807 Abolition of the Slave Trade Act, a legislative milestone achieved after nearly two decades of persistent advocacy. The episode highlights the Navy’s evolving role from one complicit in the transatlantic slave trade to becoming an active enforcer against it, effectively functioning as a global police force on the seas.

Olusoga emphasizes the significant sacrifice made by generations of British sailors who participated in this extensive campaign, many of whom succumbed to tropical diseases and perished during naval confrontations aimed at suppressing illegal slave trading. Despite their efforts and the Navy’s pivotal role in curbing the trade, this chapter of history remains largely underrecognized today.

The documentary situates this naval intervention within a broader historical context, detailing how the Act’s enforcement marked a shift in British maritime policy and international engagement. By confronting illegal slave trading operations, the Royal Navy set a precedent for subsequent global policing activities and contributed to the eventual decline of the transatlantic slave trade.