Nomos

Black Death - United-Kingdom

None The Less

Post Hardcore - United-Kingdom

Nord (UK)

Doom Metal - United-Kingdom

Nordenglander

Black Metal - United-Kingdom

Nordic Giants

Experimental Metal - United-Kingdom

Nordland

Black Metal - United-Kingdom

Norgathaal

Black Metal - United-Kingdom

Northern Oak

Pagan Folk - United-Kingdom

Not Above Evil

Melodic Death Black - United-Kingdom

Nova Prospect (UK)

Industrial Electro - United-Kingdom

Novacrow

Hard Rock - United-Kingdom

November Coming Fire

Screamo - United-Kingdom

Novere

Death Doom - United-Kingdom

Novichok (UK)

Thrash Metal - United-Kingdom

NSU

Heavy Rock - United-Kingdom

Number One Son

Nu Metal - United-Kingdom

Numpty Wizard

Death Black - United-Kingdom

Nurseflesh

Industrial Black - United-Kingdom

Nutz

Hard Rock - United-Kingdom

Nyctophilia (UK)

Black Metal - United-Kingdom

Nyctophobia (UK)

Funeral Doom - United-Kingdom

Nyctopia

Black Metal - United-Kingdom

Nyogtha

Black Metal - United-Kingdom

Nyx (UK)

Thrash Death - United-Kingdom

Oakenshield

Pagan Folk - United-Kingdom

Oakhaart

Technical Death - United-Kingdom

Oath (UK)

Heavy Metal - United-Kingdom

Oath To Overwhelm

Brutal Death - United-Kingdom

Obelisk (UK)

Deathcore - United-Kingdom

OBEY (UK-1)

Thrash Metal - United-Kingdom

Obey (UK-2)

Doom Metal - United-Kingdom

Obiat

Stoner Doom - United-Kingdom

Obius

Progressive Metal - United-Kingdom

Obliteration (UK)

Thrash Metal - United-Kingdom

Oblivion (UK)

Ambiant Black - United-Kingdom

Oblivion Protocol

Progressive Metal - United-Kingdom

Oblivionized

Grindcore - United-Kingdom

Obscene Entity

Death Metal - United-Kingdom

Obscene Nihilist

Death Metal - United-Kingdom

Obscure (UK)

Deathcore - United-Kingdom

Obscure Lupine Quietus

Black Metal - United-Kingdom

Obsidian (UK)

Death Metal - United-Kingdom

Obsidian Key

Progressive Metal - United-Kingdom

Obskure (UK)

Dark Ambient - United-Kingdom

Obsolete Tomorrow

Progressive Death - United-Kingdom

Obsydian Tears

Thrash Metal - United-Kingdom

Obzidian

Technical Thrash - United-Kingdom

Occulted Death Stance

Black Metal - United-Kingdom

Ocean City

Post Hardcore - United-Kingdom

Ocean Walker

Progressive Metal - United-Kingdom

Oceanica

Progressive Metal - United-Kingdom

Oceans Apart

Metalcore - United-Kingdom

Oceans Ate Alaska

Metalcore - United-Kingdom

Oceanus

Atmospheric Metal - United-Kingdom

October File

Post Hardcore - United-Kingdom

October Grey

Progressive Metal - United-Kingdom

October Revolution

Metal - United-Kingdom

Oculus (UK)

Symphonic Metal - United-Kingdom

Ode Of Eternity

Gothic Metal - United-Kingdom

Odessa

Metalcore - United-Kingdom

Odium (UK)

Black Metal - United-Kingdom

Odium Incarnate

Death Metal - United-Kingdom

Odour Of Death

Black Metal - United-Kingdom

Of Ghost

Metalcore - United-Kingdom

Of Mara

Black Metal - United-Kingdom

Of Solitude And Solemn

Atmospheric Doom - United-Kingdom

Of Spire And Throne

Doom Metal - United-Kingdom

Of The I

Progressive Metal - United-Kingdom

Oferwintran

Black Metal - United-Kingdom

Offal Grinder

Grindcore - United-Kingdom

Ofnus

Atmospheric Black - United-Kingdom

Ogof

Black Metal - United-Kingdom

OHHMS

Atmospheric Doom - United-Kingdom

Ohvrikivi

Pagan Black - United-Kingdom

Okami

Thrash Metal - United-Kingdom

Old Corpse Road

Melodic Death Black - United-Kingdom

Old Forest

Black Metal - United-Kingdom

Old Horn Tooth

Doom Metal - United-Kingdom

Old Iron King

Sludge Metal - United-Kingdom

Old Maid

Thrash Death - United-Kingdom

Old Man Lizard

Stoner - United-Kingdom

Oldblood (UK)

Stoner Doom - United-Kingdom

Olde Crone

Doom Metal - United-Kingdom

Oliver Dawson Saxon

Heavy Metal - United-Kingdom

Olivia Neutered John

Grind Death - United-Kingdom

Omega (UK)

NWOBHM - United-Kingdom

Omega Centauri

Atmospheric Black - United-Kingdom

Omega Point (UK)

Death Grind - United-Kingdom

Omen (UK)

NWOBHM - United-Kingdom

Ommadon

Doom Metal - United-Kingdom

Omnicide (UK)

Power Metal - United-Kingdom

Omnipotent Hysteria

Brutal Death - United-Kingdom

Ona Snop

Hardcore - United-Kingdom

Once A Wolf

Metal - United-Kingdom

Once I Tried

Death Grind - United-Kingdom

Oncology

Death Metal - United-Kingdom

Ond

Thrash Metal - United-Kingdom

One Down

Hardcore - United-Kingdom

One Last Run

Hard Rock - United-Kingdom

One Machine

Thrash Metal - United-Kingdom