Complex sentence: The refurbished channel was opened on 19 July 2014 by Owen Paterson, the MP for North Shropshire, but because there is no winding hole at the end of it, the limit of navigation remained at Gronwen Wharf for most boats.
Split into simpler sentences: The refurbished channel was opened on 19 July 2014 by Owen Paterson, the MP for North Shropshire. Because there is no winding hole at the end of it, the limit of navigation remained at Gronwen Wharf for most boats.