Far-right protesters from the British National Party and English Defence League are expected to gather outside the court building.
The two men accused of murdering soldier Lee Rigby are due to appear in court today as they prepare to stand trial at the Old Bailey.
Michael Adebolajo, 28, and Michael Adebowale, 22, are charged with murdering the Fusilier as he walked back to Woolwich Barracks in south-east London on May 22.
They are also each accused of attempting to murder a police officer on the same day, and conspiracy to murder a police officer on or before that day.
Protesters from The British National Party and the English Defence League have been congregating outside court this morning.
The case itself is listed for a mention hearing at 2pm.
Father-of-one Fusilier Rigby, 25, from Middleton, Greater Manchester, died of multiple cut and stab wounds when he was attacked as he returned to the barracks after spending the day at the Tower of London.
Adebolajo, from Romford in Essex, has asked to be known as Mujaahid Abu Hamza in court, while Adebowale, from Greenwich, south-east London, has asked to be called Ismail Ibn Abdullah.
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