Complex sentence: He was a founding member and the lead vocalist and lyricist of the Welsh alternative rock band Lostprophets, who disbanded in 2013 after he was charged with sexual offences in late 2012.
Split into simpler sentences: He was a founding member and the lead vocalist and lyricist of the Welsh alternative rock band Lostprophets. The group disbanded in 2013 after Watkins was charged with sexual offences in late 2012.