Hey Viti.
CNS is traded on the ASX1 segment of the LSE so unfortunately can’t be added.
Have a look here for some of the other requirements to add specific stocks.
Stocks & ETFs requests Help - 
Stocks & ETFs requests - Trading 212 Community
Hey Viti.
CNS is traded on the ASX1 segment of the LSE so unfortunately can’t be added.
Have a look here for some of the other requirements to add specific stocks.
Stocks & ETFs requests Help - Stocks & ETFs requests - Trading 212 Community