Complex sentence: Philippa Forrester co-hosted the show for the first three series series five and Extreme 2, the fourth series and Extreme 1 was co-hosted by Julia Reed and the seventh series by Jayne Middlemiss.
Split into simpler sentences: Philippa Forrester co-hosted the show for the first three series, series five and Extreme 2. The fourth series and Extreme 1 were co-hosted by Julia Reed and the seventh series by Jayne Middlemiss.