Complex sentence: Jon's role in the band is songwriter, lead vocalist and lead guitarist, he was initially accomplied on guitar by the man now called Mince Fratelli (Gordon McRory), but Mince switched to drums after the initial drummer didn't work out.
Split into simpler sentences: Jon's role in the band is songwriter, lead vocalist and lead guitarist. He was initially accompanied on guitar by the man now called Mince Fratelli (Gordon McRory), but Mince switched to drums after the initial drummer didn't work out.