| Oakdale Middle School Car Boot Sale | @ Poole Adult Education Centre, Poole |
| OASIS tribute +Stone Roses show | @ Cox's Yard, Warwickshire |
| OASIS Tribute Definitely Might be + S... | @ Cox's Yard, Warwickshire |
| Oasist | @ The Horn, Hertfordshire |
| Observe the Sons of Ulster Marching T... | @ Hampstead Theatre, London |
| Ocean Colour Scene | @ The M Club, Cheshire |
| Octane, KIDD KAOS, Nutty T, D4RK, Dou... | @ Mass Nightclub, LONDON |
| Octopussy | @ Liquid, Newcastle Upon Tyne |
| Odemba OK Jazz all Stars | @ Liverpool Philharmonic Hall, Liverpool |
| Odyssey | @ Pleasance, London |
| Off Modern | @ Corsica Studios, London |
| Off The Rails Comedy Club | @ The Royal George, Oldham |
| Off The Wall - Comedy, Dinner & Dance | @ Agenda, London |
| Official Brighton Carnival After Part... | @ Concorde 2, Brighton |
| Official Receivers Soul Band | @ Cox's Yard, Warwickshire |
| Oh So Sunday After Parties | @ Po Na Na, Brighton |
| Oh Well Never Mind Bye | @ Union Theatre, London |
| Oh What A Lovely Recession Every Frid... | @ Peacock Bar, London |
| Oh, my green soap box | @ Tobacco Factory Theatre, Bristol |
| Ohbijou, Support | @ Captains Rest, Lanarkshire |
| Oi Polloi | @ Priory, Doncaster |
| Okkervil River | @ Captains Rest, Lanarkshire |
| Oklahoma! | @ Chichester Festival Theatre, Chichester |
| Old Masters in a Modern Light | @ Whitfield Fine Art, London |
| Old School Reggae and R&B | @ Happy Peoples Restaurant, London |
| Old Time & Modern Sequence Dancing | @ Morecambe Platform, Lancashire |
| Old time music hall | @ Wrexham Memorial Hall, Wrexham |
| Old Time Music Hall with the Lissende... | @ Lauderdale House, London |
| Oli Brown Band | @ The Boardwalk, Sheffield |
| Oliver Twist | @ Central Studio, Basingstoke |
| Ollie Austin | @ Artrix, Bromsgrove |
| Ollie Austin, Best of Friends Tour | @ Bacon Theatre, Cheltenham |
| Olney Farmers Market | @ Market Place, Bucks |
| Omega | @ The Fly, London |
| Omer fast: solo show | @ South London Gallery, London |
| OMGIMY's Bare Bones | @ 93 Feet East, London |
| OMGIMY's Hoodoo Voodoo! | @ South London Pacific, London |
| On the mic - Open Mic | @ Southsid Bar, London |
| On The Piste | @ Oldham Coliseum, Oldham |
| On the Rocks | @ The Island Bar, Birmingham |
| On The Waterfront | @ Haymarket Theatre Royal, London |
| Once In A While | @ Excelsior Club, LONDON |
| Once Upon a Poem, Twice Upon a Tale | @ Poetry Cafe, London |
| One Fly-over & A Cuckoo's Nest | @ Inn on the Green, London |
| ONE FOR THE ROAD with DJs | @ Roadhouse, Manchester |
| ONE HORSE RACE, Special Guests | @ The Sugarmill, Stoke-on-Trent |
| One Little Word | @ Rhodes Arts Complex & Bishop's Stortford Museum, Hertfordshire |
| One Man Show Off by Dave Florez | @ Hen and Chickens, London |
| ONE MIC..The Launch ft Babatunde, Jam... | @ Bernie Grant Centre, London |
| One Night Of Queen | @ Cresset, Peterborough |
| One Night Of Queen | @ City Hall Salisbury, Salisbury |
| One Night Of Queen | @ Princes Hall, Aldershot |
| One Night Stand Comedy Night | @ Cafe Artisan, Lancashire |
| ONE PARTY STATE club, Lights Go Blue,... | @ Barfly, London |
| One Summer On | @ Water Rats Theatre, London |
| One Way Street | @ Theatre503, London |
| Oneida, My Device, Teeth of the Sea | @ Prince Albert, East Sussex |
| OneSevenFours | @ Water Rats Theatre, London |
| OneTaste | @ Bedford, London |
| Oneyeopen | @ Water Rats Theatre, London |
| ONLY REMAINING ORIGINAL WAILER: BUNNY... | @ Q Club, Birmingham |
| Onslaught, Visceral Deity, Arkum | @ Ivory Black's, Glasgow |
| Oo-bop-sh'bam | @ Farnham Maltings, Surrey |
| OPAL - international theatre directio... | @ Lugte, Basildon |
| Open daily | @ The Observatory Science Centre, Hailsham, Hailsham |
| Open Day | @ Dennis Severs' House, London |
| Open Days 2008 | @ Victoria Baths, Manchester |
| Open Decks Night | @ Loom, London |
| Open Farm | @ Aldborough Hall Farm, Essex |
| Open Film Screening Night | @ Spacex Gallery, Exeter |
| Open House - Asian and African collec... | @ The British Library, London |
| Open House - Caring for your family a... | @ The British Library, London |
| Open Meditation Class (Tuesday evening) | @ London Buddhist Centre, London |
| Open Meditation Class (Wednesday even... | @ London Buddhist Centre, London |
| Open Mic | @ The Ram Jam Club, Surrey |
| Open Mic Acoustic Night | @ Finnegan's Wake, London |
| Open Mic and Spoken Word | @ The Half Moon, London |
| Open Mic hosted by LUSH | @ LadyBird, London |
| Open Mic Night | @ Locomotive Inn, North Yorkshire |
| Open Mic Night | @ Comedy Cafe, London |
| Open Mic Night | @ Southern K, London |
| Open Mic Night | @ River Bar and Brasserie, London |
| Open Mic Night | @ Elgins, Cleveland |
| Open Mic Night | @ Yates's, Newport |
| Open Mic Night | @ Spice of Life, London |
| Open Mic Night | @ Balgonie Arms Pub, Glenrothes |
| Open Mic Night | @ The Bull, Colchester |
| Open Mic Night | @ Belushi's Fulham, London |
| Open Mic Night | @ The Maltings Theatre and Arts Centre, Berwick-upon-Tweed |
| Open Mic Night | @ The Crown Inn, Chislehurst |
| Open Mic Night | @ Betty Nicols, Fife |
| Open mic night | @ The Carnival, North Lincolnshire |
| Open Mic Night | @ The RoadHouse, Birmingham |
| Open Mic Night | @ The Continental, Preston |
| Open mic night! | @ Hare & Hounds, Brighton |
| Open Mic Session | @ Belushi's, London |
| open mic Sing For Your Supper | @ Royal Albert, London |
| Open Mic/ No Mic Rehearsal | @ The Railway Tavern, Colchester |
| Open Range | @ INDEPENDENT PHOTOGRAPHERS GALLERY, East Sussex |
| Open Weekend - Family Fun Day | @ Harrow Arts Centre, Middlesex |
| Open Your Eyes | @ Jacksons Lane, London |
| OpenArt | @ The Maltings Theatre and Arts Centre, Berwick-upon-Tweed |
| Opera Excerpts | @ Bridewell Theatre, London |
| Optic Saturday | @ Optic Club, Norwich |
| Optic Therapy, Dinky, Paris Revolutio... | @ The Actress and Bishop, Birmingham |
| Oral Cabaret | @ Maltings Arts Theatre, Herts |
| Oral History | @ Booth Museum, East Sussex |
| Orange Goblin, Symphony Cult | @ Underworld, London |
| Orange Goblin, Symphony Cult, Thought... | @ Concorde 2, Brighton |
| Orchestra Cube: Open Rehearsal | @ The Cube, BRISTOL |
| Organ Recitals | @ Westminster Abbey, London |
| Original Tea Dance | @ BJ's White Swan, London |
| Orlando - Latin Live Music | @ La Rioja Restaurant, London |
| Orphans & Vandals | @ The Twisted Wheel, Glasgow |
| Orpheus & Eurydice | @ Blackheath Halls, London |
| Orquesta Buena Vista Social Club | @ Liverpool Philharmonic Hall, Liverpool |
| Orquesta Buena Vista Social Club | @ City Hall Salisbury, Salisbury |
| Orquestra - Buena Vista Social Club | @ New Theatre Oxford, Oxford |
| Orquestra Imperial | @ KOKO, London |
| Orton Farmers Market | @ Orton Market Hall, Cumbria |
| Osmosis | @ Rooty Fruity, Birmingham |
| Oswestry Farmers Market | @ Bailey Head, Shropshire |
| Othello | @ Bridewell Theatre, London |
| Othello, Icarus Theatre Collective, O... | @ Bacon Theatre, Cheltenham |
| Other Smiths | @ The Boardwalk, Sheffield |
| Otley Farmers Market | @ The Market, Otley |
| Otters Swimming Club | @ Hayes Pool, Middlesex |
| Oundle Farmers Market | @ Market Place, Cambridgeshire |
| Oundle General Market | @ Market Place, Cambridgeshire |
| Out of Sight | @ Underworld, London |
| Out of Sight /Lights & Sounds Save Yo... | @ Fat Sams, Dundee |
| Out of Sight, Save Your Breath, Light... | @ CLwb Ifor Bach, Cardiff |
| Out of touch | @ Tobacco Factory Theatre, Bristol |
| OUTCRY COLLECTIVE + DEAD FORMATS, Spe... | @ Corporation, Sheffield |
| Outdoor Antiques Market | @ Market Place, Northamptonshire |
| Outdoor Flea Market | @ Chesterfield Market, Chesterfield |
| Outdoor Flea Market | @ Piece Hall, Halifax |
| Outdoor Fleamarket | @ Market Place, Nottinghamshire |
| Outdoor Fleamarket | @ Bulwell Market Place, Nottingham |
| Outdoor Fleamarket | @ Market Place, Hertfordshire |
| Outdoor Fleamarket Market | @ Market Place, Nottinghamshire |
| Outdoor Market | @ Gorton Market, Gorton |
| Outdoor Shakespeare, Merchant of Venice | @ Oystermouth Castle, Swansea |
| Output World Tour, Fedde Le Grande / ... | @ Ministry of Sound, London |
| Outside Edge | @ West Dean Gardens, Chichester |
| Outside In: Biennial Competition | @ Pallant House Gallery, West Sussex |
| Outside The Box | @ The Fighting Cocks, Surrey |
| Over 55s group | @ Sydenham library, London |
| Over 60's Lunch Menu | @ Plough Inn, Leicestershire |
| Over The Moon | @ Favela Chic, London |
| Overdose | @ Po Na Na, Norwich |
| OVERLOAD THE FORT | @ Spitbank Fort, Fareham |
| Oxjam: Live at the Roadhouse | @ Roadhouse, London |
| Oysterband, Support | @ Union Chapel, London |
| OYSTERBAND, The Oxford Girl & Other S... | @ The Dutchess, North Yorkshire |
| OŽDeath, Support | @ The 100 Club, London |
