“… The Mersey Docks and Harbour Board have a right by statute to detain the vessel until the dock tonnage rates and harbour rates are paid. That is an express statutory right, and the board have nothing to do with any sale of the vessel to a purchaser. That is a matter which only concerns those who are interested in the vessel. It does not concern the board. The board are entitled to detain the vessel, whoever is the owner, until the rates are paid. The order appealed against deprives them of that right, and without their consent purports to give them an option to try and make some claim to a lien upon or right against the fund in priority to other claimants. The board have no such lien or right. If this vessel had been allowed to leave the dock, the board would have been left to make a futile claim against the fund in court…”