Complex sentence: Nurtured in his village team of Taibach RFC, Mainwaring was an ever present in the Aberavon RFC team before being first capped in 1966-7 season against Scotland in Murrayfield, he played in all of the Welsh games of that term.
Split into simpler sentences: Nurtured in his village team of Taibach RFC, Mainwaring was a regular member of the Aberavon RFC team before his first cap in 1966-7 season against Scotland at Murrayfield. He played in all of the Welsh games of that term.