This is the first I've heard of this, but it hardly seems like the UK press made him do it. The lady asked a question about his achievement and he responded talking about his shirt.
Perhaps he genuinely felt bad about what he (probably unthinkingly) chose to wear, the possible message it sends, and wanted to address it?
Perhaps he genuinely felt bad about what he (probably unthinkingly) chose to wear, the possible message it sends, and wanted to address it?