William Wyndham Grenville, 1st Baron Grenville, PC, PC (Ire), FRS (25 October 1759 – 12 January 1834) was a British Pittite Tory politician who served as Prime Minister of the United Kingdom from 1806 to 1807, but was a supporter of the Whigs for the duration of the Napoleonic Wars.As prime minister, his most significant achievement was the abolition of the slave trade …