...successfully done things like apply for passports in the new surname?
To cut a long story short, I had to provide a letter of consent to the deed poll office outlining why I was unwilling/unable to contact DS's absent, violent 'father' to get his written agreement to the surname change. I gave them court and police reference numbers (he was arrested several times due to DV towards me and I obtained a non-molestation order). The deed poll office have accepted this and granted the name change, but they did warn me that not all official bodies would accept it.
So, has anyone managed to get a passport for a DC whose surname has been changed, or get places like schools and surgeries to accept the new name? How difficult is it? Do they need to see the letter of consent too, and possibly the court/police paperwork? TIA!