Leo started his career at the young age of 11, appearing in such shows as Jewels, The Upper Hand, Eastenders and The Bill.
Career highlights include Out of Control which won the prestigious Michael Powell Award for Best British Feature Film in 2002, Stoned directed by Stephen Woolley in which Leo played the leading role of Brian Jones, the BAFTA award winning The Mark of Cain and Dexter Fletcher’s directorial debut Wild Bill.
Further screen credits include; Avengement (Samuel Goldwyn Films); Once Upon a Time in London (Signature Entertainment); London Kills (Netflix); Plebs (Rise Films); Dawning of the Dead (Full Motion Entertainment); Foyle’s War (ITV); Strike Back (Sky One/Cinemax);The Musketeers (BBC); The Team (Lunanime Films); Northmen: A Viking Saga (Elite); The Hooligan Factory (Think Big Productions); The Ninth Cloud (120Db Films); Top Dog(Richwater Films); Law & Order UK (ITV); All Things To All Men, The Hobbit, Mrs Biggs(ITV); Wild Bill (Independent); I Nationens Intresse, One In The Chamber, Payback Season, Above Suspicion (La Plante Productions); Silent Witness (BBC); Bulla: The Movie(Independent); The Big I Am (Independent); Thorne: Scaredy Cat (Sky); Goal III(Milkshake Films); Cass (Independent); Daylight Robbery (Independent); Reverb(Independent); The Mark of Cain (Revolver Entertainment); Perfect Creature (Twentieth Century Fox); Tristan & Isolde (Twentieth Century Fox); Cracker (Granada Television);Green Street Hooligans (Odd Lot Entertainment); Stoned (Number 9 Films); Perfect Creature (Darclight Media); Susie Gold (Pathe); Bard To Verse (BBC Films); Octane(Independent); EastEnders (BBC); Out of Control (BBC); Young Offenders (BBC Films);Menace (Channel 5); Fallen Dreams (Independent); As If (Columbia Television); Bodily Harm (Tiger Aspect); Hidden City (Hallmark Television); Menace (Greenlit Productions);The Glass (Granada Television); The Jury (Granada Television); When I Was 12 (BBC);Aberdeen (First Run Features); Nature Boy (BBC); Aberdeen (Norsk Films); The Bill(Thames Television); McCallum (Scottish Television Enterprises); Samson and Delilah(Beta Films); Jewels (NBC); The Upper Hand (Carlton Pictures); The Hamilton Trilogy: In The Interest of The Nation (Pampas Productions AB); Cracker (Granada television)
Theatre credits include: Drag On (Royal Court Theatre); Local Boy (Hampstead Theatre);Clubbed Out (Royal Court Upstairs); Made of Stone (Royal Court)
Leo also co-produced and starred in the independent film Top Dog alongside Jason