'Senior Whitehall sources were keen to stress that it would be Brown's duty to remain in place until it were clear that a successor exists who was capable of securing a majority for their own speech.
The Queen will not intervene in any discussions between the political parties, the sources made clear, although she can expect to be kept informed of developments.
It is for the political parties to agree on a prime minister who can win support for the speech.
Although conventions remain unclear, it will be open for the Queen to reject a call for a dissolution of parliament if it is not in the national interest. But this was unlikely, the sources said.'