I fly with them at least 4 times a year and this has never been a problem. On my last trip however both in Italy and at Stansted they asked me for extra proof of identity as children have different surname from me. As I had my British passport with me, which shows my double barreled surname, they let me go. I did question him however and his reply was that I should travel with birth certificate. Never heard that before.
Surely if children have passport they can travel with anybody. What if they go on hol with my mum?
Anyone with similar experience or knows more?