Complex sentence: She is one of the main weather presenters on BBC Breakfast, simulcast by both channels until 08:30 weekdays, presenting alternate fortnights with Louise Lear; and regularly presents the weather on the BBC Six O'Clock News.
Split into simpler sentences: She is one of the main weather presenters on BBC Breakfast, simulcast by both channels until 08:30 weekdays, presenting alternate fortnights with Louise Lear. Carol regularly presents the weather on the BBC Six O'Clock News.