David Cameron will hope questions about his handling of the Maria Miller expenses row will not overshadow the launch of the Conservatives campaign for next month's European elections.
Mrs Miller resigned from her position as Culture Secretary yesterday after sustained pressure over the disclosure she had wrongly claimed thousands of pounds in mortgage interest payments.
She was also criticised for her 32-second House of Commons apology.
The Prime Minister repeatedly defended her but admitted the party had experienced a "difficult week" and said he under-estimated the depth of the "raw" public anger over MPs' expenses.
Maria Miller handed in her resignation today, saying the row over her expenses had become 'an enormous distraction'.
It is possible that the Chancellor had come to a different conclusion from the PM as to which way the Maria Miller crisis was going.
The son of a Pakistani immigrant, the newly-appointed Culture Secretary has been tipped by some as a future Conservative leader.