After 1800, when the profitability of sugar plantations declined, which British groups pushed for the end of slavery?

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After 1800, as the profitability of sugar plantations declined, various British groups began to push for the end of slavery. This included Protestant ministers, who were motivated by moral and humanitarian reasons; free traders, who believed that labor should move freely and that slavery was an impediment to economic efficiency; and labor unions, which saw slavery as a threat to the wages and conditions of free workers. Collectively, these groups contributed to the growing movement against slavery, leading to its eventual abolition in the British Empire with the Slavery Abolition Act of 1833.

After 1800, When the Profitability of Sugar Plantations Declined, Which