Praia

The Metropolitan Police investigation that began in 2011 built to a peak in 2014, with substantial searches near Praia da Luz - but they did not appear to have any identifiable suspects.

The golden sandy beach of Praia da Luz is dominated by huge cliffs to the east, a mix of orange sandstone and black volcanic rock.

In June searches in Praia da Luz are carried out, including an area of scrubland situated south-west of the Ocean Club complex.

Portuguese police say the search - which covers the municipality of Lagos near Praia da Luz - is due to continue until Friday.

The search will reportedly take place in Praia da Luz, the town in the Algarve where she went missing nearly two decades ago.