Wearing a dark suit with a white shirt, frequently tightening the knot on his dark blue tie, Djouhri was ordered to stay at his daughter's home in the British capital.
Embroiled in an investigation into the suspected Libyan financing of Sarkozy's 2007 election campaign, he has refused to respond to summons for questioning in Paris.
Well known among France's rightwing political establishment, Djouhri is facing fraud and money-laundering charges and will next appear in court for an extradition hearing.
The Swiss resident has been a focus of the inquiry opened in 2013 by judges investigating claims by former Libyan ruler Moamer Kadhafi and his son Seif al-Islam that they provided funds for Sarkozy's election effort.
Djouhri is suspected of being the true owner of the villa, which was sold at a "very inflated" price, a source close to the inquiry told AFP.
Both men failed to heed summons for questioning issued by the anti-corruption investigators in September 2016.
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