The Liberal Democrats will not support "austerity forever" and would lead a Government which balanced paying off debts with "investing in the future", according to a senior member of the party.
Chief Secretary to the Treasury Danny Alexander told Good Morning Britain the Lib Dems also had to show voters how the party "was distinct" from the Conservatives and Labour.
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Some 66 people have been killed after the plane they were travelling on crashed in southern Iran.
The letter calls for an end to harassment, abuse, and impunity in a world "ripe for change".
Police say that anyone who sees Whitehouse should not approach him, but instead call them on 999 and quote incident 23 of 18 February.