Police said they have increased their presence on Victory Road in Derby, where six children were killed in a house fire. They added that the mobile police station will return to the area and there will be extra patrols after two people were arrested on suspicion of murder.
More top news
Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.