Jeffrey Hayward and George Parsons have a lot to talk about. They were both born just after the First World War ended. They both then fought in the Second World War, Jeff at Dunkirk, George all over Europe. They both made it safely home. And they've both just turned 100.
As young soldiers they feared they'd never get to grow old.
George Parsons fought in Norway and then joined the new Commando Regiment. Jeffrey Hayward was part of a unit that formed a perimeter around Dunkirk as the Germans were advancing.
They also marked the 74th anniversary of VJ Day singing together just as crowds of Londoners did all those years ago when Japan surrendered to the allies and the war finally ended.
Looking back they have this advice for today's young Londoners.
A simple recipe for a long and happy life.