My favorite is “British Left Waffles on Falkland Islands,” but alas I have seen no evidence that this headline was actually printed in a newspaper. Why people think they need to make such things up when there are so many true examples is a mystery, but that’s the world we live in.
If you have access to ProQuest (my college unfortunately seems to have cancelled its subscription), you might be able to verify or refute this. As mentioned in this thread, a variety of sources, including at least one apparently scholarly book, give a specific date and newspaper (April 28, 1982, The Guardian) for the headline, which to my mind increases the likelihood it is real. At the time of that thread, the digitization of back issues had not reached 1982, but based on the description of the archives at the Guardian site, it should have by now. (However, they apparently no longer offer archival access at their own site, only through ProQuest.)