Hope you won't mind me posting 2 more recent versions:

Three Ravens (Karine Polwart)

Three ravens sat upon a tree - Hey doun, hey derrie day
Three ravens sat upon a tree - Hey doun
Three ravens sat upon a tree
And they were black as black could be
And Sing la do la do a day

And the middle one said tae his mate - Hey doun, hey derrie day
The middle one said tae his mate - Hey doun
The middle one said tae his mate
Oh where shall we our dinner get
And Sing la do la do a day

And it's doun in yonder grass green field - Hey doun, hey derrie day
It's doun in yonder grass green field - Hey doun
It's doun in yonder grass green field
There lies a Knight that's newly killed
And Sing la do la do a day

And his horse is standing at his side - Hey doun, hey derrie day
His horse is standing at his side - Hey doun
His horse is standing at his side
And thinks he might get up and ride
And Sing la do la do a day

And his hounds are lying at his feet - Hey doun, hey derrie day
His hounds are lying at his feet - Hey doun
His hounds are lying at his feet
And they lick his wounds sae sore and deep
And Sing la do la do a day

There came a Lady full of woe - Hey doun, hey derrie day
There came a Lady full of woe - Hey doun
There came a Lady full of woe
As big with child as she could go
And Sing la do la do a day

And she's stretched herself doun at his side - Hey doun, hey derrie day
She's stretched herself doun at his side - Hey doun
She's stretched herself doun at his side
And for the love of him she's died
And Sing la do la do a day


And my absolute favourite - a compilation of the Twa Corbies & the False Knight created on the way to a folk club in Cornwall when Kathy Wallis (Cats) couldn't decide which to sing:

Dead Knight Behind the Hedge (Jon Heslop)

Oh where are you going
Said the dead knight behind the hedge
We're going for our lunch
Said the two crows as still they stood

How did you know I was here
Said the dead knight behind the hedge
Well we just had a hunch
Said the two crows as still they stood

Oh where is my horse & hound
Said the dead knight behind the hedge
They're nowhere to be found
Said the two crows as still they stood

Where is my Lady fair
Said the dead knight behind the hedge
She's buggered off somewhere
Said the two crows as still they stood

And what bit will you eat first
Said the dead knight behind the hedge
We're gonna eat your tongue
Said the two crows as still they stood

Uuuuuuuuuuuhhhhhhhhhhhhh
Said the dead knight behind the hedge
Well that was jolly fun
Said the two crows and flew away