ALAN BALDWIN LEWIS Hamilton said he had been moved by a letter from the son of a man facing the death penalty in Bahrain and assured activists on Saturday he would not let rights issues go unnoticed. Campaigners sent letters to the seven-times Formula One world champion last month before the first of two grands prix in Bahrain. In them, they urged Hamilton to meet activists, wear a T-shirt with a message of support and discuss matters with the Crown Prince. Hamilton had said he needed time to digest the content of the letters. Asked for an update ahead of…