It set sail nearly seven years late but in the event proved its worth. After quelling stormy seas that left two other ferries sheltering in harbour, the Glen Sannox is finally serving islanders on Arran. As if to prove its durability, some passengers on its first scheduled voyage at dawn on Monday reacted in the traditional fashion to heavy seas, by vomiting into its brand-new toilets, while cafeteria trays slid over the tables. Its maiden voyage from Troon to Brodick should bring to an end years of cancelled sailings for Arran, which has damaged the island’s fragile tourist economy and