• Organisations formerly designated as terrorist by the United Kingdom (1 P)

A

• Abu Sayyaf (2 C, 8 P)
• Al-Qaeda in the Arabian Peninsula (2 C, 15 P)
• Al-Qaeda in the Islamic Maghreb (3 C, 35 P)
• Armed Islamic Group of Algeria (1 C, 11 P)

C

• Continuity Irish Republican Army (6 P)
• Cumann na mBan (1 C, 4 P)

E

• Egyptian Islamic Jihad (33 P)
• ETA (separatist group) (3 C, 14 P)

H

• Hamas (4 C, 41 P)
• Haqqani network (11 P)
• Hezbollah (7 C, 66 P, 1 F)

I

• Irish National Liberation Army (3 C, 10 P)
• Irish People's Liberation Organisation (8 P)
• Islamic Jihad Movement in Palestine (2 C, 17 P)
• Islamic Jihad Union (6 P)
• Islamic Movement of Uzbekistan (1 C, 12 P)

J

• Jemaah Islamiyah (1 C, 40 P)

K

• Kurdistan Freedom Hawks (1 C, 1 P)
• Kurdistan Workers' Party (2 C, 16 P)

L

• Lashkar-e-Jhangvi (1 C, 3 P)
• Lashkar-e-Taiba (2 C, 9 P)
• Liberation Tigers of Tamil Eelam (4 C, 33 P)

N

• Proscribed paramilitary organisations in Northern Ireland (11 C, 14 P)
• Al-Nusra Front (2 C, 4 P)

R

• Revolutionary People's Liberation Party/Front (2 C, 8 P)

S

• Al-Shabaab (militant group) (2 C, 7 P)

U

• Ulster Defence Association (2 C, 19 P)

W

• Wagner Group (4 C, 11 P)

A

• Abdullah Azzam Brigades
• Abu Nidal Organization
• Aden-Abyan Islamic Army
• Ajang Ajang group
• Al-Ashtar Brigades
• Al-Muhajiroun
• Al-Mukhtar Brigades
• Al-Qaeda in the Arabian Peninsula
• Al-Qaeda in the Islamic Maghreb
• Ansar al-Islam in Kurdistan
• Ansar al-Sharia (Libya)
• Ansar al-Sharia (Tunisia)
• Ansar Bait al-Maqdis
• Ansar Dine
• Ansaru
• Al-Aqsa Martyrs' Brigades
• Armed Islamic Group of Algeria
• Aum Shinrikyo

B

• Babbar Khalsa
• Balochistan Liberation Army
• The Base (hate group)
• Bloque Meta
• Boko Haram

C

• Caucasus Emirate
• Cumann na mBan

D

• Democratic Revolutionary Front for the Liberation of Arabistan

E

• East Indonesia Mujahideen
• Egyptian Islamic Jihad

H

• Hamas
• Haqqani network
• Harkat-ul-Jihad al-Islami
• Harkat-ul-Jihad-al-Islami Bangladesh
• Harkat-ul-Mujahideen
• Hasm Movement
• Hizb ut-Tahrir

I

• Indian Mujahideen
• Irish National Liberation Army
• Islam4UK
• Islamic Jihad Union
• Islamic State – Algeria Province
• Al-Itihaad al-Islamiya
• Al-Qassam Brigades

J

• Jaish-e-Mohammed
• Al-Jama'a al-Islamiyya
• Jama'at Nasr al-Islam wal-Muslimin
• Jamaat Ansar al-Sunna
• Jamaat Ul-Furquan
• Jamaat-ul-Mujahideen Bangladesh
• Jemaah Islamiyah
• Jund al-Aqsa
• Jundallah (Iran)

K

• Kach
• Kurdistan Freedom Hawks
• Kurdistan Workers' Party

L

• Lashkar-e-Jhangvi
• Lashkar-e-Taiba
• Liberation Tigers of Tamil Eelam
• Loyalist Volunteer Force

M

• Moroccan Islamic Combatant Group
• Al-Mourabitoun (militant group)

N

• National Action (UK)
• New Irish Republican Army

O

• Óglaigh na hÉireann (Real IRA splinter group)
• Orange Volunteers
• Osbat al-Ansar

P

• Pakistani Taliban
• Palestinian Islamic Jihad
• People's Defence Forces
• Popular Front for the Liberation of Palestine – General Command
• Provisional Irish Republican Army

Q

• Al-Qaeda

R

• Real Irish Republican Army
• Red Hand Commando
• Red Hand Defenders
• Revolutionary Nuclei
• Revolutionary Organization 17 November
• Revolutionary People's Liberation Party/Front

S

• Saor Éire (1967–1975)
• The Saved Sect
• Al-Shabaab (militant group)
• Sheikh Omar Hadid Brigade
• Sipah-e-Sahaba Pakistan
• Soldiers of Egypt

T

• Tahrir al-Sham
• Tehreek-e-Nafaz-e-Shariat-e-Mohammadi
• Terrorgram
• Turkistan Islamic Party

U

• Ulster Defence Association
• Ulster Volunteer Force

W

• Waad Allah Brigades
• Wagner Group