London Mayor Boris Johnson is set to announce new plans to regenerate Crystal Palace Park later on today.
Although specific details of the plans have not yet been released, the proposals include "major inward investment" to restore parts of the park to their former historical state.
The park, located in Bromley, is well-known for its Victorian dinosaur models, designed by Benjamin Waterhouse Hawkins.
Earlier this year, a Chinese developer reportedly put forward proposals to rebuild a historic palace which originally stood in the park but was destroyed by fire in 1936.
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The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants