For some reason I can't find my original thread. I posted about travelling with kids who have different surname to me to France this summer.
We flew back into gatwick yesterday. I didn't get asked at all on the way out but on our return I got asked to prove that I was DS's Mum. DD who is over 12 had gone through the automatic barriers. I had to show him ds birth certificate and the certificate of entry which has my maiden name on.
I also had with me a letter from DH, copy of our marriage certificate, copy of DH passport. He was only interested in the birth cert. So if you are travelling alone with kids with a different surname you do need proof that they are your children.