In 1772 Lord Mansfield, a judge, ruled that a runaway slave there could not be forced back by his master to the West Indies.

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And in 1772, in London, Lord Mansfield, nudged by the advocacy of Granville Sharp, an abolitionist, judged that Africans could not be transported against their will.

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High-profile lawyers for the campaign, Michael Mansfield QC and Lord Falconer, appeared at the meeting via an internet videolink.

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