Move over, boring commutes — tea time has arrived underground. British Airways is turning NYC’s S shuttle into a rolling airline cabin from April 21 through May 14, complete with cheeky British-accent announcements, faux overhead bins, and cabin-style seating. Through April 23, commuters can even enter a contest by showing off their best British accent for a shot at free flights to London. It’s part subway, part sky-high stunt — and only in New York.