Hundreds of charities, community groups and companies took part in Saturday's parade.
The annual LGBTQIA+ event will take place across central London on Saturday 4 July.
Enfield Council's new Tory leader says the shift on flag flying provides "clarity and consistency".
The double Olympic champion and advocate for LGBTQ+ rights is given the accolade at a special ceremony.
Christopher Joell-Deshields was fired from Pride in London following an investigation into his conduct.
Lawyers for Pride in London say Christopher Joell-Deshields has failed to hand back company accounts.
Christopher Joell-Deshields was suspended earlier this month after financial misconduct allegations.
Volunteers also allege say there is a "culture of bullying" at the organisation, run by Christopher Joell-Deshields.
Khan will perform hits including I'm Every Woman, Ain't Nobody and I Feel For You.
