The Swan Hunter shipyard is still being used by offshore marine companies, but hope is that it will one day support thousands of jobs.
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The pair defrauded Durham County Council out of nearly £100,000 but were given suspended sentences.
Gascoigne is alleged to have sent abusive tweets, text messages and telephone calls to Amanda Thomas in March this year.
The Black Cats are attempting to find their seventh permanent boss since the Irishman's departure.