Who is Lieutenant H.J. 'Ted' from Pegasus Bridge: June 6, 1944 and what is their importance?

Lieutenant H.J. Sweeney was a platoon leader. He flew in a plane that followed a few minutes behind the gliders on June 6, 1944. Sweeney remained in the army after the war, and he retired at the age of fifty-five, after which, he became the director of the Battersea Dog's home.