The Steam Packet Company says continuing work at Liverpool Ferry Terminal means its sailings will divert again this weekend.
Contractors working for the Department of Infrastructure will be carrying out more work at the Princes Half-Tide Dock site.
On its website, the company says sailings will go to Heysham instead of Merseyside on Saturday, November 22 and Sunday, November 23.
Coaches will transfer passengers between Lancashire and Liverpool.
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