The Mayor's Entrepreneur Competition has been expanded to offer three prizes of £20,000 each - one for each award category. The three award categories are Environment, Tech, and Creative Industries. You can find out more about the categories and their challenges here.
Ideas will only be allowed to be entered under one award category, with business ideas for each sector being judged separately.
Additionally, there will be a semi-final round this year to get the top 90 down to the final 15, who will then pitch to a panel of celebrity judges.