The start of the grouse season - nicknamed the Glorious 12th - was delayed until August 13 because game shooting on Sundays is illegal.
This year is also the last before the EU bans a chemical to control bracken. Campaigners say the ban will devastate the countryside.
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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.