Nigel Farage will speak at UKIP's spring conference in Exeter today, saying that the public are angry with the failure of the three mainstream parties to deal with key issues.
The party is hoping to make a big breakthrough in local and European elections in May, and Farage will tell the party it is competing on a "bigger scale" than ever before.
Farage will list a range of areas - from Europe Union membership to cost of living and an obsession with renewable energy - where the public feels "incredibly let down".
More top news
Two doctors have been charged after a 30-year-old woman died while having an emergency caesarean.
Janet Faal was left badly injured after leaving the house for only the third time in ten years.
More than 100 small business owners say they support Ukip's policies to help small traders in a letter published in the Daily Express.