Ray Dagg, a former London Metropolitan Police constable and now 72, was the 19-year-old responding to noise complaints made by neighbours on January 30, 1969.
The director collated more than 60 hours of footage from Michael Lindsay-Hogg s 1970 film Let It Be, documenting the band s fractious recording sessions for what would be their final album.
In the four-minute clip the iconic Liverpool band are seen beginning to plan their first live show in over two years in 1969 and have to write an entire album in three weeks.
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