Tamil protesters staging a demonstration in the City of London are now reported to be on the move.
It is understood that they are heading from Bank to the Commonwealth Secretariat offices at Marlborough House on Pall Mall.
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The Prime Minister was invited to meet survivors and residents of the west London tower block privately on Tuesday night.
Residents in Camden unsuccessfully campaigned to save the site at St James' Gardens, which was used as a burial ground from 1790 to 1853.
Police have released an e-fit of a man suspected of attacking her.