 However its name is used for an official area name - Bagley - which is an electoral division of the county council and a ward of the town council.The brook follows to some extent the old course of the River Severn which was cut off from the rest of the Severn at the last Glaciation period.When the River Severn floods in a severe way, such as in November 2000, the area around the Bagley Brook also floods (about ).