Complex sentence: The first station and the branch line was built by the St. George's Harbour and Railway Company and opened on October 1st 1858 and at first the trains ran to and from Conwy station until the completion of Llandudno Junction station.
Split into simpler sentences: The first station and the branch line was built by the St. George's Harbour and Railway Company and opened on October 1st 1858. The trains at first ran to and from Conwy station until the completion of Llandudno Junction station.