Police have launched an investigation to find out those responsible for arranging the wedding that took place on the premises of a Charedi girls school in Hackney on Thursday night.
While the Metropolitan Police had put the number of guests at 400 in their initial report, they have now revised the figure to closer to 150.
The state-aided Yesodey Hatorah Senior Girls High School said it had been unaware of the event taking place and its hall had been leased to an external organisation.
The organiser of the event – condemned as a “shameful desecration” by Chief Rabbi Ephraim Mirvis – faces a £10,000 fine.
But in an update, the Met said it had launched an investigation to identity “those others responsible for organising and who attended the wedding.”
Police had found steps had been taken to “mask” the function by covering windows.