Up to 50 police had searched daily in the Leckwith area for him, as well along the River Ely in Cardiff Bay.
BBC: Ben Thompson search: Body found in Cardiff river
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South Wales Police said the stretch of river between Leckwith Hill bridge and the mouth of the River Ely near Cardiff Bay Yacht Club will be the area searched on Thursday for Mr Thompson, who is a worker at South Hook LNG gas plant in Pembrokeshire.