As an FYI:
Once the Silvertown Tunnel is completed next year the Dart Charge will be extended to the Blackwall and Silvertown crossings as well.
And also to the Tideway crossing when that is completed in 2030.
Therefore it will be impossible to pass London to the East without paying a toll.
So unless you live south of the Thames valley/M4 to get to Kent/the Channel Ports & Tunnel you will need an account.
The family account, with every possible number plate on it, is the way to go.
Once the Silvertown Tunnel is completed next year the Dart Charge will be extended to the Blackwall and Silvertown crossings as well.
And also to the Tideway crossing when that is completed in 2030.
Therefore it will be impossible to pass London to the East without paying a toll.
So unless you live south of the Thames valley/M4 to get to Kent/the Channel Ports & Tunnel you will need an account.
The family account, with every possible number plate on it, is the way to go.