A five-year-old girl and her grandfather, who drowned at a Portuguese beach, have been named as Lara Lewis and Brian O'Dwyer.
Fishermen tried in vain to save Lara and Mr O'Dwyer, 66, who were pulled from choppy waters at the tourist resort of Nazare, 60 miles north of Lisbon.
It is thought that Lara's parents, University College London professer Philip Lewis and Sian Lewis, were sunbathing on the beach when Lara went for a walk with her grandparents.
They strayed into a hazardous area that was not patrolled by lifeguards and were dragged into the sea by rough waves.
A spokesman for the Maritime Authority in Nazare said: "The sea (on) that beach is very dangerous. The wave that swept them in was very big."
The girl's grandmother was rescued off Salgado beach by two fishermen and taken to hospital. She was later discharged.
Emergency services attempted to revive Lara for nearly an hour before she was pronounced dead.
David Mason, a neighbour of the family from Hackney, east London, said the community has been shocked by the tragedy.
He said: "I remember them bringing her home in her dad's arms and they were such a happy family. She was a very happy girl who would always say 'hello Dave' when she saw me.
"You expect young children to be almost invulnerable. She was so full of life.
"This is terribly sad news and for a lot of people it's still sinking in. They were well known across the community and a lot of people are very upset by the news."
The incident happened in the picturesque fishing village just before 2pm on Tuesday.
According to English-language newspaper The Portugal News, Nazare Port Authority commander Albuquerque e Silva said: "The grandfather was already dead when he was hauled from the water.
"Emergency services attempted to resuscitate the child, but to no avail.
"The two victims, accompanied by the grandmother, went on a stroll away from the Salgado beach, which is under lifeguard surveillance, and it must have been during this period that they were knocked over and dragged in by the waves."
Cathy Morris, a British journalist in the region, told Sky News that an autopsy will not be carried out on the bodies of Lara and Mr O'Dwyer. They will remain in a hospital mortuary until the family makes arrangements.
The Foreign Office said it was in touch with local authorities in the country.
A spokesman said: "We are aware of reports of the death of two British nationals in Portugal and we are in touch with the local authorities."