Complex sentence: However in November 2008 Southern Vectis announced that due to this, the journey time from Ryde to East Cowes was once again increased, resulting in the route significantly under performing, threatening a complete service cut to the Haylands and Binstead Estate area.
Split into simpler sentences: However in November 2008 Southern Vectis announced that due to this, the journey time from Ryde to East Cowes was once again increased. This provides a potential threat of a complete service cut to the Haylands and Binstead Estate area.