One that generated the most curiosity was one of Barack Obama in front of 10 Downing Street given that our English cousins aren't casting any ballots.

I just learned that the ads were all part of a campaign launched by The Times. Tricky Brits.
When things happen, they sometimes leave a smear on the windshield of the car of life. I'm here to help investigate what that smear is, and if possible, to take a sample to catalog it for future study. Until we get the results from this analysis, we'll need to postpone final judgment.
"It could even help explain road rage, said Matthew Walker, director of UC Berkeley's Sleep and Neuroimaging Laboratory and senior author of the study, which was coordinated with researchers from Harvard University.This is sooo true for me. If I don't get enough sleep, I become a cranky, nasty, and volatile person. I'm a racecar running in the red, and all I'm saying is that it's not good to have a racecar in the red. I eat sleep. It's my dessert.
"One of the functions of sleep is to reset and replenish the emotional integrity of our brain circuits so we can approach the day's emotional challenges in appropriate ways," Walker said. "If you don't get a good night's sleep, you'll be making irrational choices.
In the UC Berkeley study of 26 young adults, half of the subjects were kept awake for 35 hours straight and the other half were allowed a normal night's sleep in that same time period. Then all of the subjects were hooked up to an MRI and shown a series of images, some of them disturbing pictures of graphic violence or gory injuries. Researchers monitored what happened in their brains as each image was shown.
When shown the disturbing images, the sleep-deprived subjects had a significant jump in activity in the amygdala, the section of the brain that puts the body on alert to protect itself. At the same time, activity slowed down in the prefrontal cortex, which controls logical reasoning.
Subjects who had gotten a full night of sleep showed normal brain activity.
What this means for most people is that a sleepless night can cause them to overreact to emotional challenges that they would otherwise be able to tolerate with no trouble, Walker said."