Metro and Shields Ferry passengers will be encouraged to wear face masks on board after January 27, but the choice will be up to individuals.
The legal requirement to wear a face-covering on public transport in England ends on Wednesday. From Thursday, passengers can choose to wear one or not.
While in London TFL will retain the requirement to wear a mask on trains, tubes and buses, Nexus, which runs the Metro and ferry, will leave the choice up to individuals.