The article mentions that! The arguments for revolution were argued out in the open. There is not a single mention of British Abolition anywhere. Frankly the British Abolitionist movement didn’t get going till after the American Revolution.
They like to claim they ended slavery before we did, but when has the UK ever had a Prime Minister of color?
The new American Congress outlawed the transatlantic African-slave trade almost simultaneously with the British Parliament, but we were stuck with the slaves we had.