Thatcher's coffin in Parliament
The body of Baroness Thatcher is in a chapel inside the Houses of Parliament, where a service was held for MPs, peers and parliamentary staff. Her funeral takes place today.
Thatcher's coffin to be taken from Parliament by hearse
Lady Thatcher's coffin is due to be taken from Parliament by hearse to the nearby church of St Clement Danes, where it will be transferred to a King's Troop Royal Horse Artillery gun carriage.
Processional minute guns will fire at the Tower of London as the carriage heads to St Paul's.
Argentina's ambassador to London Alicia Castro has declined an invitation to attend the funeral, in a mark of continuing tension over the Falkland Islands.
Downing Street has also insisted Mr Cameron is not disappointed with Washington's decision not to send currently serving senior politicians to the funeral.
Barack Obama's official delegation will be led by George Shultz and James Baker, who both served as secretaries of state during the Thatcher era.
Former US vice-president Dick Cheney and ex-secretary of state Henry Kissinger are also due to attend in a personal capacity.
French President Francois Hollande will be represented by Elisabeth Guigou, a close adviser to Francois Mitterrand while Lady Thatcher was in office.
Read: The Order of Service for Baroness Thatcher's funeral.
Watch: Margaret Thatcher's funeral route.
Read: Lady Thatcher's funeral details.
Read: Falkland Islanders' tribute to 'the liberator'.
Read: From Clarkson to Bassey - Who was invited to the funeral?
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The Order of Service for Baroness Thatcher's funeral
Downing Street has released a detailed Order of Service for Baroness Thatcher's funeral on Wednesday.
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Margaret Thatcher funeral details revealed in full
The full details of Baroness Thatcher's funeral have been released by Downing Street.
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Carol Thatcher defends her mother's place in history
Baroness Thatcher's daughter Carol has spoken publicly to thank everyone who sent messages of sympathy and support.