 The rebels began to cross from Southwark onto London Bridge on the afternoon of 13 June . The defences on London Bridge were opened from the inside , either in sympathy for the rebel cause or out of fear , and the rebels advanced into the city . At the same time , the rebel force from Essex made its way towards Aldgate on the north side of the city . The rebels swept west through the centre of the city , and Aldgate was opened to let the rest of the rebels in . 
