What identifications do children need when they fly?
In the UK, policies regarding acceptable identification for children under the age of 16 are largely determined by the airline. The airlines offering domestic service largely do not require children under the age of 16 to have any form of ID if they are flying with a parent, though some may require some form of ID, even in this circumstance, if the children are not listed in the parent’s passport. I’ve provided a link regarding ID policies on Flybe, since I assume that you’re flying with them, given the arrival and departure locations. They specifically note that children under the age of 16 who are traveling with a parent or legal guardian do not need their own ID, but if the child is 16 or older or is flying unaccompanied, they will need to have their own ID.