Lady Cynthia Blanche Mosley[n 1] (née Curzon; 23 August 1898 – 16 May 1933), nicknamed "Cimmie", was a British aristocrat, politician and the first wife of the British Fascist politician Sir Oswald Mosley.

After that Mosley started his move towards fascist policies, losing many of those who had joined the New Party as a result.

Lady Cynthia's letter read: "Istanbul, 4th September, 1930 Dear Comrade Trotsky, I would like above all things to see you for a few moments.

There is no good reason why you should see me as (1) I belong to the Labour Party in England who were so ridiculous and refused to allow you in, but also I belong to the ILP and we did our very best to make them change their minds, and (2) I am daughter of Lord Curzon who was Minister for Foreign Affairs in London when you were in Russia!

I need hardly say I come as a private person, not a journalist or anything but myself—I am on my way to Russia, I leave for Batum-Tiflis-Rostov-Kharkov and Moscow by boat Monday.

In 1935, Trotsky recalled his meeting with Lady Cynthia, expressing no surprise in her husband Oswald's subsequent journey over to the far-right and becoming the British leader of fascism, with Trotsky also questioning what became of Lady Cynthia personally and politically before "her sudden death" in 1933.

[5] All the New Party's candidates in the 1931 election lost their seat or failed to win in constituencies, instead seeing a unified coalition government which involved the Conservatives, Liberals and a breakaway from the main Labour Party amid the Great Depression.