Brian Hambleton lost his sister Maxine in the Birmingham Pub Bombings in 1974.
He will be protesting tonight outside a lecture delivered by Martin McGuinness, the Deputy First Minister of Northern Ireland.
The lecture is being held at a Peace Centre in Warrington, set up by the parents of a 12-year-old boy killed in an IRA attack.
Mr Hambleton has campaigned ever since the atrocity to bring the killers to justice.
More top news
The first volunteers from the NHS depart for Sierra Leone today to join the continuing fight against Ebola.
Latest weekend weather forecast for the East and West Midlands.
A memorial service has been held at Birmingham Cathedral to remember the victims of the Birmingham pub bombings 40 years ago tonight.