Former UK PM Wilson's affair with aide revealed decades later
• Harold Wilson, former UK PM, had an affair with his deputy press secretary Janet Hewlett-Davies in 1976 while both were married
• The affair was revealed this week by Wilson's former aides Joe Haines and Bernard Donoughue after Hewlett-Davies' recent death
• They kept the affair secret at the time to avoid political damage but wanted it in the historical record after 50 years
• Wilson cryptically confessed to Donoughue, who inferred Wilson was asking if he knew about the affair
• Aides said the affair boosted Wilson's morale in his final years as PM amid political/health issues