Also at the service is Ulster Unionist (UUP) leader Doug Beattie, Traditional Unionist Voice (TUV) leader Jim Allister, Alliance leader Naomi Long, Social Democratic and Labour Party (SDLP) MP Claire Hanna, former DUP leader Peter Robinson, PSNI deputy chief constable Mark Hamilton, loyalist Jackie McDonald and the grand secretary of the Orange Order, the Rev Mervyn Gibson.
