Blue plaques in Trafford Blue Plaques commemorate historic sites connected with local people or events of importance. Individuals commemorated are considered eminent by their peers or were benefactors making important contributions to the community. They should be sufficiently well known for their names to be familiar to the succeeding generation, often within their own field of expertise. If you wish to make a suggestion for a commemoration please contact the Local Studies Centre. Usually, commemorations would only be considered at least 20 years after the person’s death or the event.