It was one of 15 squadrons of the Polish Air Force in exile that served alongside the Royal Air Force in World War II.

[1] Formed on 29 August 1940[2] at RAF Church Fenton, the squadron inherited the traditions, along with the emblem and a large part of the initial crew, of the pre-war Polish Torunian Fighter Squadron.

The bear climbing a tree (Coat of arms of Madrid) was an emblem of the No.

In the course of its existence, the squadron claimed 68 confirmed kills, 16½ probable, and 26 damaged.

It was disbanded on 6 January 1947[2] after the end of World War II.