Perhaps in his eagerness to avoid the electorate of Rawmarsh Ward, Shaun Wright or the Regional Labour Party would have checked whether there were any obstacles to his candidature.
Among those who are disqualified from standing are members of staff at a Council (except teachers), including County, Borough and parish councils (note that, as with police staff, even if you are not in a politically restricted post, you still can’t stand for this election).
Councillors are allowed to stand, unless they are members of the police authority, who can’t.
Shaun Wright clearly has a problem on at least two counts. Expect resignations soon!