Jason and Nicola were on the last stop of their round-the-world trip when the towering waves struck.

On Boxing Day 2004, a 9.1 magnitude earthquake triggered a tsunami that raced towards shorelines ... Jason, 56, adds: "We were just in a whirlpool of really strong currents that we couldn't ...

Twenty years on, Watana Sittirachot looks back on that fateful day in 2004 when the ‘big wave’ changed his life ...