Lutfur Rahman, who was banned from standing for office for five years in 2015 after being found guilty of electoral fraud, was filmed entering the meeting before the journalists were forced to leave.
Mr Rahman is looking to form the party with his former deputy Ohid Ahmad, who is vying to be elected for his ally’s former role at the 2018 mayoral election, according to the BBC.
As they try to enter the room they are greeted by a group of his supporters who ask them to leave the “private meeting”.
Disgraced ex-mayor Lutfur Rahman ejected the BBC from a meeting
I will do everything I can to help Ohid Ahmad win back the mayoralty
Mr Ahmad can be seen at the front of the room and walking towards the camera as the journalists eventually give up on their argument and leave the building.
Mr Rahman and Mr Ahmad have appeared together on campaign literature, endorsing the latter’s bid to become the mayor, under the banner of the “Tower Hamlets Together” party.
The same name and logo also appears on an application sent to the Electoral Commissioner to set up the new political party, reports the BBC.
On the material, Mr Rahman writes: “I will do everything I can to help him win back the mayoralty.”
Ohid Ahmad, who is backed by Mr Rahman to become Tower Hamlets mayor, was also at the meeting
The government have sent a letter to the Commission requesting it to “forensically review” any application for a new party involving the former mayor.
John Biggs, the current mayor of Tower Hamlets, said: “I think if he had any shame he would hang his head and go away quietly, maybe, for a lifetime.
“I am sort of hopeful that the people of our borough will recognise that he led us into a dead end and that we need to move forward.”
In a statement, Mr Ahmad said he was standing in the 2018 mayoral election but had “yet to finalise whether I will stand as an independent or under a party banner”.
Express.co.uk has contacted Mr Ahmad for further comment on the story.
Mr Rahman was ousted from office in 2015 after being found guilty of corrupt and illegal practices and is vying to reduce his five-year ban from public office.
A group of voters took legal action against him in 2015 over a series of allegations of electoral fraud including ballot paper tampering.
After being found guilty of corrupt and legal practices, Mr Rahman was removed from the position and the 2014 mayoral election was declared void.
He has constantly maintained there was “little, if any” evidence of wrongdoing against him and later unsuccessfully challenged the ruling of the Election Commissioner Richard Mawrey.