I've just realised today that my Zapiro feed hasn't been updated in a while. Well, a little investigation soon revealed the cause: I've been caught napping.
M&G have updated their website and in the process moved the location of the Zapiro cartoons. I rely on screen-scraping to grab the cartoons so things soon broke. I've been so busy lately, I've been neglecting my logs too so missed the fact my script was failing.
Well, not anymore. I've updated my script to account for the new M&G site layout and the feed should be producing updates from now on.