We've been split since DD twins were babies. They're now 7. They see their dad twice a year and he lives hundreds of miles away. He is staunchly atheist and would never agree to a christening.
I've had a baby with my partner (been together for years) and we'd like to get all the kids christened together. DDs do a lot of religious education at school and would be keen.
Basically if I ask for exH permission, he'd definately say no. But frankly- he puts so little effort in (contact maybe once a month on skype between visits) that I'm inclined to do it anyway, even though I know it would be against his wishes. I know I'm probably BU (and ironically that this doesn't feel like a very 'Christian' thing to do!) But I'd really like to do it.