5. The Gri. Flash - in public Rare 1973 Live Concert Recording Of Prog Legends Flash Featuring Peter Banks 'Flash – In Public' Released October 29, 2013 Much to the anticipation of progressive rock fans worldwide, for the first time, a rare recording of UK prog group Flash, featuring legendary guitarist Peter Banks, from January 21, 1973 will be released on CD on October 29, 2013.