any letter from absent father to say he is ok with the trip? Does anyone know? Have tried to check online but not sure. We all 3 have British passports and the father has one and lives UK and has oked the trip. But have nothing in writing.
Get something in writing. I don't know how you are with each other but if things are volatile he could make a Hague Convention case against you for removing the children from the country. If things are good a quick email to put it in writing wouldn't be too much to ask and if they are not then you absolutely need to cover this base.
It is recommended to take a letter wherever you go. I haven't usually taken one but did for my last trip abroad and will do from now on, mainly because my ex doesn't answer his phone and would actually be a huge PITA to get hold off in a hurry.