Campaigners have lost their High Court case to save six libraries in Brent, north west London.
After the verdict, the Brent Libraries SOS campaign asked the council to “take time” to close them.
But by lunchtime on the day of the verdict the council had padlocked the doors of the libraries.
More than 100 protesters chanted “save our library” as the council tried to board up the century-old Kensal Rise Library.
The case was seen as a test case for other legal bids to save libraries.
“It’s been one of the biggest campaigns locally,” said Brent activist Sarah Cox. “It’s complete cultural vandalism to close down libraries.
“But unfortunately the legal strategy hasn’t worked. These are libraries that were occupied to save them in the 1980s—and they won.”