In a statement, the Alliance Party said it was standing firmly behind its policy of flying the union flag at council headquarters on designated days and was called for the NorthernIreland Executive to legislate for this as a requirement for all councils.
He said the flag at the NorthernIreland Assembly building should be flown at half-mast on the day of her funeral and books of condolence opened "across NorthernIreland".
He said he wanted those angry about the flag decision to support the legal challenges and his promises of a campaign to re-assert British cultural identity within NorthernIreland.
"That leadership is that NorthernIreland is part of the United Kingdom and a considerable number of people want the Union flag to be flown in a respectful and orderly way, " he said.