Great guide stut, just one point which I think you should correct.

The journey to Whitechapel using the pink readers must be via Stratford, this is because the old East London Line goes via Shoreditch high Street which is in zone 1.

I have been caught out by this myself when I used to travel from Camden to Angel. Going from Kentish Town West via Highbury and Islington made no difference to the fare. I am not sure why they put Shoreditch High Street in Zone 1, but it has been suggested to me that it is to discourage those in the south from travelling to the north, but suspect the real reason is to maximise revenue for TfL.