A Labour government will give councils new powers to stop pay day lenders and betting shops swamping high streets, Ed Miliband pledged.
Businesses that do well out of hard times are springing up in place of shops, restaurants and banks but town halls are almost powerless to act, the party leader warned.
He set out Labour proposals to change planning laws so councils could refuse permission for certain businesses, including payday lenders that "engulf" people in debt.
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The major party leaders' campaigns for the General Election will remain suspended on Wednesday following the Manchester terror attack.
Thousands of people have donated to help the families of the victims - as well as a homeless man who came to their aid.
Some children, particularly those who have been more directly affected, may show symptoms of stress and trauma.