MARSTON MORETAINE, England—With flowers and lights, Britain paid tribute on Wednesday to Captain Tom Moore, 100, who touched the hearts of millions by offering a simple message of hope and self-sacrifice during the COVID-19 lockdown. Moore, who raised tens of millions of pounds for the National Health Service (NHS) by walking up and down his garden, leaning on a frame, died on Tuesday in Bedford Hospital after suffering pneumonia and COVID-19. He had been fighting cancer for five years. Outside his home in Marston Moretaine, 50 miles (80 km) north of London, children laid flowers. One message read: “Rest in Peace Captain Tom. We love you. X.” “You will always be our hero,” read another message. “Thank you for your warmth and your wonderful smile. Rest in Peace.” His picture was shown on Piccadilly Circus in central London while the London Eye, Wembley Stadium, and the Blackpool Tower shone lights …