The service in which the Bishop of Sheffield will lead prayers for church organist Alan Greaves, who died after being attacked on his way to Midnight Mass on Christmas Eve, is due to begin shortly.
Dr Steven Croft earlier confirmed his presence in a tweet ahead of the service:
To St. Saviour's High Green this morning to be with the Church and community there following the murder of Alan Greaves, organist and Reader
More top news
A British national is believed to have died in Greece after apparently being attacked by a pack of stray dogs.
Becoming clearer and cooler across western areas.
Jeremy Corbyn avoided a potential clash over Brexit at Labour's annual conference after delegates agreed not to push the issue to a vote.