Better error message for invalid URL for offsite links
Better error message for invalid URL for offsite links

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