A mate of mine wants to bring his girlfriend and her two kids to the UK from the U S for a little break.Mum...sorry MOM and the kids have no intention of remaining here and will return.All have their own passports and here is the problem ...my mate thinks he has heard that airlines will deny boarding to kids and Mum if they don't have written permission from the kids' dad..can any prooner (in the airline side of things or legal side of things )confirm or deny this?.The kids' dad is a bit of a scumbag having walked out and left no forwarding address.Any info deeply appreciated.