Which former prime minister earns the most for corporate speeches?

Voyage into history How did the Labour government respond to the arrival of the Empire Windrush on 22 June 1948? While the ship was at sea, Prime Minister Clement Attlee tried but failed to have it diverted to East Africa so that its passengers could work on the groundnut scheme. He later wrote to concerned MPs that it was ‘a great mistake to regard these people as undesirable or unemployables. The majority of them are honest workers, who can make a genuine contribution to our labour difficulties at the present time. It is difficult to prophesy whether events will repeat themselves, but I think it will be shown that too