Between two and three o'clock, the marches came together and an estimated 5,000 people converged on the London International Financial Futures Exchange (LIFFE). A fire hydrant was set off, symbolising the freeing of the Walbrook river, and the lower entrance to the LIFFE was bricked up. Banners were hung, reading "Global Ecology Not Global Economy", and "The Earth Is A Common Treasury For All", the latter a quote from Gerrard Winstanley of the seventeenth century Diggers movement. Graffiti messages were sprayed and CCTV cameras were disabled. Then sound systems set up and drum & bass music and punk bands played. In the early afternoon a small group of protesters broke into the Cannon Bridge building, smashed up the reception area and tried to access the LIFFE trading floor, but were prevented by a security screen.