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This article is mostly a stub. Additional information should be added, for example:

- The Sunday National Launched on 9th September 2018 with Walker as its editor [1] [2]

-Walker's position is defined by the National as 'Consultant Editor' in the weekday edition [3]

-Walker was important [undefined - additional sources needed] in organising a pro-independence rally in late 2019, hosted by the national and with the First Minister in attendance [4] [5]