I think the government should apologise for slavery, and set up a national day of remembrance for it. This country is still enjoying the benefits of the revenue from slavery, and African countries and people are still affected by the legacy of colonialism and slavery, so it's not as if it was too long ago to be worried about. Imagine if Germany hadn't apologised for the Holocaust - there'd be an outcry.
I also like the idea that the proposed memorial day commemorates the activities of Toussaint L'Ouverture.
If you agree, you can sign a petition asking the government to apologise.