In early March 1978, Stevie Shears, whose style of guitar playing was considered a limiting factor, was sacked from the band after they toured England and joined Cowboys International in 1980. He was replaced by Robert Simon (ex-member of Ian North's Neo), who during his first days with the band changed his performance-name to Robin Simon. Some time in 1978, the group also dropped the exclamation mark, becoming simply "Ultravox". The new line-up performed live at the Reading Festival along with Radio Stars, Penetration, Sham 69, The Pirates and The Jam, playing early versions of "Slow Motion" and "Quiet Men" on 27 August 1978.