"It wasclear the newfans were more affluent," saysJohnWilliams, directorof the Sir Norman ChesterCentre for FootballResearch at the UniversityofLeicester.
But Sir Paul McCartney, Phil Collins, Aretha Franklin, Sir Elton John, Robbie Williams, Eric Clapton, Bryan Adams and Stevie Wonder could be among the artists performing.
Speaking to the Today programme, which is being guest edited by Liberal Democrat peer Baroness Williams, SirJohn said that changes needed to be put in place which reasserted the "independence of mind" of backbench MPs and remove special advisers practicing the "black arts".