Police are allowing female protesters to remain in St Paul's and are no longer present within the cathedral, a spokesman for City of London police said.
Staff at the cathedral told police they were happy for the activists to remain and so officers left the building but maintained a presence outside to police the protest there, the spokesman said.
Protesters opened a large banner on the cathedral steps with the slogan "throw the money-changers out of the temple". The action came as the anti-greed group marks the anniversary of its now dismantled protest camp outside the cathedral.
More top news
A second Scottish independence referendum is "even more likely" after Theresa May's Brexit speech, Nicola Sturgeon has said.
At least 100 people are feared dead in the bombing including soldiers and Nigerians working for Doctors Without Borders.
Each broadcast automatically disappears as soon as a recording finishes and users have the option to disable comments.