Nearby UR says that the “Woolwich Ferry does not open until 11:30am on Sundays” On checking the timetable Here they are correct. 
And that’s how the restrictions are already set. The Saturday restriction runs from 19:45-11:30. “The restriction will end on the following day”
Sorry miss read the restriction. Just replying to nearby UR that was saying about it closing early on Sundays. :oops: