Complex sentence: Foulkes co-presented the CITV weekday afternoons service (with Scally), from April-December of 1989, from 4:00-5:10pm on each weekday of the year, except bank holidays.
Split into simpler sentences: Foulkes co-presented the CITV weekday afternoons service (with Scally), from April-December of 1989. It ran from 4:00-5:10pm each weekday of the year, except for bank holidays.