Grenvillite

George Grenville fully came into his own as a politician in 1763, when he was made Prime Minister, but his own following was not sufficient to form a government.

Nevertheless, he and his supporters backed the new ministry, and William Grenville soon became one of Pitt's closest advisors and served for ten years (1791–1801) as Foreign Secretary during the difficult period of the French Revolutionary Wars.

Their disagreements were many, most apparently on the topic of war with France, wherein the Grenvillites wished to prosecute it more aggressively, but Fox desired peace by negotiation.

When Pitt died two years later, however, the King had little choice but to appoint a government including both the "New" and "Old" Opposition, and Grenville became Prime Minister in the Ministry of All the Talents.

Although the coalition partners agreed about little besides the abolition of the slave trade, it was really the King's opposition to the ministry that destroyed it in early 1807.