The wreck of the Douro, a Liverpool ship that in 1843 was wrecked and sunk beneath the seas at Round Rock, Isles of Scilly. This was 36 years after British ships were banned from the slave trade.

Reputed to be heading to Portugal when it went down, the ship had a cargo of textiles and munitions. Divers have since found large numbers of manillas – bronze bracelet-shaped trading tokens on the wreck. These were used as currency to trade for enslaved men and women in West Africa.

The manillas found in the Douro wreck suggest that the ship might have been involved in illegal slaving, or it was carrying supplies for the banned trade.......