The Deputy First Minister of Northern Ireland, Martin McGuinness, is due to address a conference hosted by a father who lost his son in an IRA attack.
Campaigners for justice for the 21 victims of the Birmingham pub bombings have travelled to protest outside the building.
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Traffic is affected between J6 A38(M) Aston Expressway and J7 A34 (Great Barr).
James Watson who was arrested over the unsolved 1994 murder of schoolboy Rikki Neave claims to be in Portugal having skipped bail.
People have been wandering into the grounds trying to catch the cartoon monsters.