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Britain's first and only female prime minister Margaret Thatcher has died peacefully following a stroke at the age of 87.
Lord Bell said: "It is with great sadness that Mark and Carol Thatcher announced that their mother Baroness Thatcher died peacefully following a stroke this morning.
"A further statement will be made later."
Baroness Thatcher, Britain's first and only woman prime minister, had become increasingly frail and was suffering ill health in recent years.
She was admitted to hospital shortly before Christmas where she underwent an operation to remove a growth from her bladder but was allowed to return home before new year.