[1] He developed an interest in politics while attending the School for the Sons of Missionaries, then in Blackheath, London (now Eltham College), from 1897 to 1905.

"[3] After leaving school, he worked as a journalist for newspapers and journals including The Quiver, the Daily News and the Christian Commonwealth.

He opposed sending troops to France during the First World War and, through his position as editor of the Labour Leader, was outspoken in his views about the conflict.

On 12 November 1914, he published an appeal for men and women of the military age to join him in forming the No-Conscription Fellowship to campaign against the possibility of the government attempting to introduce conscription in Britain.

Lilla acted as provisional secretary at their cottage in Derbyshire until the beginning of 1915, when the membership had grown so large that it had become necessary to open an office in London.

[4] The No-Conscription Fellowship produced a weekly newspaper, The Tribunal, which was suppressed; through the activity of Joan Beauchamp it continued production, although her refusal to divulge the name of the printer caused her to be charged with contempt of court and held in custody for 10 days.

[5] Shortly after his release, Brockway was arrested for a third time for his refusal to be conscripted, after being denied recognition as a conscientious objector.

[7] Brockway stood for Parliament several times, including at Lancaster in 1922 and against Winston Churchill at Westminster Abbey in a 1924 by-election.

Brockway tried to warn the public of the Nazi threat, but he was instructed by the British Embassy in Warsaw NOT to mention "the minority issue" of Poland.

According to David Howell, after 1932 Brockway "sought to articulate a socialism distinct from the pragmatism of Labour and the Stalinism of the Communist Party".

Despite Brockway's previous pacifist commitment, he resigned from War Resisters' International, explaining:If I were in Spain at this moment I should be fighting with the workers against the Fascists forces.

I appreciate the attitude of the pacifists in Spain who, whilst wishing the workers success, feel that they must express their support in constructive social service alone.

[13]He assisted in the recruitment of British volunteers to fight the fascist forces of Francisco Franco in Spain through the ILP Contingent.

[16] He also sought to re-enter Parliament, unsuccessfully contesting wartime by-elections for the ILP at Lancaster in 1941 and Cardiff East in 1942.

On 28 March 1950, he forced a debate in the House of Commons on the decision by the Labour government of the UK to banish Seretse Khama from his homeland, the British protectorate which became Botswana.

[24] Brockway was a prominent member of the British Humanist Association and South Place Ethical Society where he became an Appointed Lecturer during the 1960s.

[28] He subsequently was created a life peer on 17 December 1964, taking the title Baron Brockway, of Eton and of Slough in the County of Buckingham,[29] and took a seat in the House of Lords.

[15][36][37] Brockway's life and legacy are celebrated in his old constituency of Slough with the now annual FennerFest, a community arts and culture festival.

A statue of Brockway stands at the entrance to Red Lion Square Park in Holborn, London; it was funded by many involved in the Commonwealth independence movements he supported and was expected to be unveiled after his death.