Halliwell's green Toyota Avensis taxi, with posters appealing for help to find Sian pinned in the back, was taken away.

BBC: Sian O'Callaghan's body found after killer's admission

Det Supt Steve Fulcher said a green Toyota Avensis estate had been seen between Swindon and Savernake Forest soon after her disappearance.

BBC: Sian O'Callaghan search officers make taxi appeal

The Deeside factory produces fully-assembled petrol engines for Toyota's vehicle manufacturing plant at Burnaston, Derbyshire where the Auris and Avensis models are produced.

BBC: NEWS | UK | Wales | North East Wales | Car maker invests ?88m on Deeside