The women used a hammer and chisel to try to break the glass case protecting the historic charter, which was the first document to put into writing the principle that the King and his government were not above the law.
Reverend Dr Sue Parfitt, 82, and Judy Bruce, an 85-year-old retired biology teacher, entered the library and tried to smash the glass case protecting the historic document using a lump hammer and chisel.
The British Library in London holds two of the four surviving copies of the Magna Carta, with the others being held at Lincoln and Salisbury Cathedrals.
In a statement, the British Library confirmed two people had "attacked the toughened glass case" containing the landmark charter in its treasures gallery.
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The latest protest comes after the High Court ruled the government acted unlawfully by approving a plan to cut carbon emissions.
The Department for Energy Security and Net Zero argued the UK could be "hugely proud" of its record on climate change and the case was largely about process, with no criticism in the judgment of its detailed plans.
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Maybe they wish to make some point you haven't recognized. Maybe they don't feel any more represented by what you are pleased to call a democracy than the writers of that document were by their kings?
No it's not. But it's also not really related to anything that's actually the problem or remotely relevant.
I agree with their objectives in the broad strokes, I just question their methods. Every time they are reported about, it's always because they've done something strange and irritating to the general population. They're not targeting big businesses, or airports, or car production plants, which you would have thought they would have done. No, they're always throwing paint on something.
From what I can tell the whole point of these protests is just iconoclasm. These presumably well meaning people have been told that the world is literally ending and that they need to make a statement by (mainly symbolically) attacking objects that other people value.
The climate crisis is genuinely a crisis but it's not going to be a cataclysm event like Roger Hallam is describing. It will likely play out as a gradual worsening in living conditions as certain occupations become unviable, increasing numbers of freak weather events, and then finally warmer countries becoming unliveable.
All of those outcomes are awful but shock tactics like this aren't going to convert anyone to the cause.