The French president and the Prince of Wales have laid wreaths at the statue of Charles de Gaulle in London to mark the 70th anniversary of the general’s radio appeal to German-occupied France.
Nicolas Sarkozy and the prince also laid a wreath at a statue of George VI.
Earlier, Mr Sarkozy and his wife Carla Bruni visited the BBC radio studio where the general famously urged his compatriots to resist Nazi occupation.
The president and British PM David Cameron will also meet veterans.
Resistance fighters and British veterans are attending a ceremony at the Chelsea Royal Hospital.
Mr Cameron will also hold an hour of talks with the French president at Downing Street, focused on efforts to boost growth in Europe, the military situation in Afghanistan and other foreign policy matters.