A few years ago I used the MK1 Portal, to set up Octopus Go I followed the steps on this video from 2:07 onwards - simples!!:-
https://www.youtube.com/watch?v=7-ohTo1r_cM
Now on the MK2 Portal this simples method has been removed.
Please let me know the new way of setting up/checking my Octopus Go tariff?