Mary Barber retraces her father’s footsteps in Singapore: ‘I picture my father on the parade ground. In the background are shipmates and Japanese prisoners of war’

The veranda at the former British military barracks on Sentosa island, just off Singapore’s southern coast, is a welcome retreat in the stifling heat. My guide, Khor Sing Hong, a retired army captain, is pointing to a two-storey whitewashed colonial building opposite.