The theme of the event, this year, is 'rebuilding Britain'.
He will attempt to win back lost support and persuade people he is a Prime Minister in waiting.
The Shadow Business Secretary Chuka Umunna said:
– SHADOW BUSINESS SECRETARY CHUKA UMUNNA
"The Coalition government has pulled the rug from under you, with confidence nose-diving as a result of their spending review. Fifty businesses a day are going bust under this government, dreams crushed, boarded up"
Later he said a Labour government would lower VAT to regenerate growth and get business moving again.