 Trouble breaking out may have been contributed by party-goers becoming over-excited, plus the unofficial presence of alcohol.Birmingham City Councillor Martin Mullaney later stated it was a failure of the fencing at Millennium Point which was the main problem, since the wind broke the solid-steel fencing down during the night, and it was then replaced with Heras fencing, as used on building sites, and extra security personnel.According to reports, about 20,000 to 21,000 (officially) or 27,000 people (police estimates) arrived for the show at Millennium Point, which had been expecting to attract just 5,000 fans, not the 15,000 and 20,000 Birmingham City Council had expected to arrive.