Not “lost” in any meaningful sense. His heroic acts were completed. He disdained rewards or acclaim in this life, but is now receiving his reward in eternity.
Winton was born to Jewish parents who converted and baptized him. (He insists that his genealogy has no connection with his willingness to transport the 200 youngsters from Czechoslovakia to Britain in 1938). Because of this, Israel has never recognized him as one of the Righteous Gentiles at Yad Vashem. Not that it matters to Winton: As far as he is concerned, his actions weren't anything extraordinary. Then shall the righteous answer him, saying, Lord, when saw we thee an hungred, and fed thee? or thirsty, and gave thee drink? When saw we thee a stranger, and took thee in? or naked, and clothed thee? Or when saw we thee sick, or in prison, and came unto thee? And the King shall answer and say unto them, Verily I say unto you, Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.
Matthew, Catholic chapter twenty five, Protestant verses thirty seven to forty,
as authorized, but not authored, by King James