Fail fast earlier in the script
Fail fast earlier in the script

Let's not bother downloading/processing anything unless we're going to
be able to create the relevant Publications in Whitehall.

YOTOV-LIMITED/whitehall,robinwhittleton/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,askl56/whitehall,ggoral/whitehall,askl56/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,robinwhittleton/whitehall,askl56/whitehall,hotvulcan/whitehall,alphagov/whitehall,ggoral/whitehall,YOTOV-LIMITED/whitehall,alphagov/whitehall,hotvulcan/whitehall,hotvulcan/whitehall,YOTOV-LIMITED/whitehall,ggoral/whitehall,askl56/whitehall,alphagov/whitehall,hotvulcan/whitehall,alphagov/whitehall