Two cars collided on the B6042 Crags Road in Creswell at about 4.45pm yesterday (Monday 24th September), and two girls, a five-year old and a toddler who was nearly two, both suffered fatal injuries.
Their 29-year-old mother and older sister, who is seven, were both taken to hospital with minor injuries.
It's thought the family come from Worksop in Nottinghamshire.
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Ahead of the conference, calls are growing for Midlands regions to have their own devolved powers to match those on offer to Scotland.
After a cool start, Sunday looks set to be a dry and bright day, with sunny spells.
Mainly dry with clear spells but possibly one or two light showers near coasts overnight, remaining largely dry on Sunday.