The Coneheads are posing as Queen's Guardsmen.
(click ad, via) If you're too young to get the Coneheads reference, look it up. PETA would certainly be happy if the Ministry of Defence elite guards were aliens who grew their own helmet hair. Not a new ad for the high-speed rail service, but new to me, and timely. Continuing with Summer Ad Day on copyranter. A previous eurostar ad featured beans Photoshopped to look like sperms.