I've tried to leave personal opinion out of this and just put as few great films in each decade category as possible.

1930s:
The 39 Steps
All Quiet on the Western Front
Sabotage
The Lady Vanishes

1940s:
The Life and Death of Colonel Blimp
Brief Encounter
A Matter of Life and Death
Black Narcissus
Brighton Rock
The Red Shoes

1950s:
The Lavender Hill Mob
The Man in the White Suit
The Ladykillers
The Bridge on the River Kwai
Dracula

1960s:
Peeping Tom
The Innocents
The Haunting
Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb
Repulsion
2001: A Space Odyssey
if….
The Italian Job
Kes

1970s:
A Clockwork Orange
Get Carter
Straw Dogs
Walkabout
Don't Look Now
The Wicker Man
Monty Python and the Holy Grail
The Man Who Fell to Earth
Alien
Monty Python's Life of Brian

1980s:
The Elephant Man
The Shining
An American Werewolf in London
Chariots of Fire
Local Hero
Brazil

1990s:
Shallow Grave
Trainspotting
James and the Giant Peach

2000s:
Chicken Run
Gangster No. 1
Spider
Dead Man's Shoes
Shaun of the Dead
The Descent
Eastern Promises
This Is England
The Dark Knight
Man on Wire

For me three of the best British films from the 50's & 60's
Attachment 161884 Attachment 161885 Attachment 161886

I've never seen Sapphire... will endeavour to check it out.

1940's

DEAD OF NIGHT
WHISKY GALORE
WENT THE DAY WELL?

1950'S
DRACULA
CURSE OF FRANKENSTEIN
BRIDGE ON THE RIVER KWAI
X THE UNKNOWN
QUATERMASS XPERIMENT


1960'S
FRANKENSTEIN MUST BE DESTROYED
THE ITALIAN JOB
2001:A SPACE ODYSSEY
BABY LOVE
ALL NEAT IN BLACK STOCKINGS
CORRUPTION
IF
TWISTED NERVE
WHERE EAGLES DARE
WITCHFINDER GENERAL
THE FEARLESS VAMPIRE KILLERS
NIGHT OF THE BIG HEAT
ROBBERY
THE SORCERERS
CUL DE SAC
THE DEADLY AFFAIR
FARENHEIGHT 451
PLAGUE OF THE ZOMBIES
BUNNY LAKE IS MISSING
DR TERROR'S HOUSE OF HORRORS
BOTH DR WHO DALEK FILMS
THE HILL
REPULSION
THE HAUNTING
LAWRENCE OF ARABIA
NIGHT OF THE EAGLE
PHANTOM OF THE OPERA (FISHER)
CURSE OF THE WEREWOLF
CASH ON DEMAND
DAY THE EARTH CAUGHT FIRE
GUNS OF NAVARONE
THE INNOCENTS
PAYROLL
CITY OF THE DEAD
HELL IS A CITY
PEEPING TOM
VILLAGE OF THE DAMNED
DRACULA HAS RISEN FROM THE GRAVE


1970'S
THE WICKER MAN
DON'T LOOK NOW
A CLOCKWORK ORANGE
THE SQUEEZE
GET CARTER
NED KELLY
PERFORMANCE
ASSAULT
THE DEVILS
FRIGHT
FRIGHTMARE
THE NIGHT DIGGER
TAKE AN EASY RIDE
PSYCHOMANIA
REVENGE
STRAW DOGS
WALKABOUT
DOOMWATCH
THE FIEND
FRENZY
THE OFFENCE
TALES FROM THE CRYPT
VAULT OF HORROR
DAY OF THE JACKAL
O LUCKY MAN!
THEATRE OF BLOOD
CALLAN
DEADLY STRANGERS
FRANKENSTEIN AND THE MONSTER FROM HELL
LEGEND OF THE 7 GOLDEN VAMPIRES
THE MARSEILLE CONTRACT
BRANNIGAN
BARRY LYNDON
THE GHOUL
THE CREEPNIG FLESH
MAN WHO WOULD BE KING
TOMMY
CASSANDRA CROSSING
THE EAGLE HAS LANDED
HOUSE ON STRAW HILL
HOUSE OF MORTAL SIN
TOWER OF EVIL
THE OMEN
SWALLOWS AND AMAZONS
A BRIDGE TOO FAR
EQUUS
PREY
SPY WHO LOVED ME
BOYS FROM BRAZIL
KILLER'S MOON
MIDNIGHT EXPRESS
THE MEDUSA TOUCH
WATERSHIP DOWN
THE WILD GEESE
ALIEN
QUADROPHENIA
SCUM
A SENSE OF FREEDOM


I LOVE BRITISH FILMS!

Please say we're picking ready for next St. George's day, I can't think straight under pressure :crying:

I'm not sure why I didn't include All Quiet on the Western Front on my list because it's a masterpiece which I voted 10/10 at the IMDb. I must go back and edit my list accordingly.