It's January 30th, 1969 in London, England.

On the top floor of a building overlooking Saville Road, 26-year-old Paul McCartney follows

the other members of the Beatles through a door, bringing them out onto the building's rooftop.

A large wooden stage has been set up in the middle of the space, and all their instruments are out waiting for them.

Paul grins at his bandmates at the prospect of what's to come, but not everyone shares his enthusiasm.

While Paul tunes his guitar, he watches George Harrison wander over to the side

of the building. George peers over the edge, shaking his head as he stares at the passers-by and traffic below.

Unlike Paul, George is far from happy about being up here on a cold Friday afternoon.

Years of playing live have taken their toll on his nerves,

and he prefers the comfort of a studio these days. His reluctance is part of the reason the band

haven't performed live in two years, but here he is today for the good of the band, and he wants

to keep the others happy. They need footage of this performance to complete a documentary film

about their next album.

So when the final sound checks are done, the band takes their positions as a handful of invited staff from their label Apple Records watch on.

Paul counts them in for the first track, a song called Get Back.

As the group gets into full swing, people on the street below stop staring skyward as

they try to find the source of the music. Soon, people start gathering on nearby rooftops to watch

the spectacle, stunned by the appearance of one of the world's most famous bands on a rooftop

in the middle of London. The unannounced rooftop performance by the Beatles will be remembered fondly as an iconic

moment in music history.

But despite the United Front the band put on for their impromptu concert, the truth is

that cracks are starting to show.

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