If your child was included on your lost, stolen or damaged passport they cannot be included on the replacement, as the law on child passports has changed. You will need to apply for a first child passport for them if they are under 16.
24-hour Passport Adviceline: 0300 222 0000 (see terms and conditions). Calls made to 0300 numbers from landlines and mobile phones are charged to customers at their network provider's national rate. Live operators are available to assist with your enquiry 24 hours a day.