Trip Advisor Lockscreen rotating wallpaper

[SimonZed]

I have activated the Trip Advisor wallpaper slideshow that appears on the lockscreen. I have it set so that the photo changes every 3 hours. Only issue is that after a few days I am back to the first photo.

Does any one have any idea how you can get more photos added to the wallpaper slideshow, OR can anyone suggest a good alternative where you can have good travel photos displayed on the lockscreen?

THANKS
Simon