King Felipe, centre, was joined by Mariano Rajoy, the prime minister, and Carles Puigdemont, president of the Generalitat of Catalonia, in Barcelona at the weekend

King Felipe VI of Spain was booed as he joined an estimated half a million people on the streets of Barcelona in defiance of terrorism.

The march took place as the authorities confirmed that a German woman, 51, had died from injuries sustained in the van attack on Las Ramblas on August 17. Her death takes the number of fatalities in that attack and the one in Cambrils to 16.

For the first time since the monarchy was restored in 1975, the king joined his subjects on the street, alongside Mariano Rajoy, the Spanish prime minister, and Carles Puigdemont, a Catalan leader.

Every time the king appeared on large screens with Mr Rajoy they were booed.

Catalan separatists were accused of using the march to