Complex sentence: She first starred in "Carry On Nurse", then "Carry On Teacher", followed by "Carry On Constable" and "Carry On Regardless" and this sealed her future as a regular "Carry On" performer.
Split into simpler sentences: She first starred in "Carry On Nurse", then "Carry On Teacher", followed by "Carry On Constable". Sims then appeared in "Carry On Regardless" and this sealed her future as a regular "Carry On" performer.