Dependants of Turkish nationals who are business persons or workers in the United Kingdom can apply to join their partners who have valid leave to remain as Turkish ECAA workers in the UK.
According to the immigration rules, a dependant under this route would refer to a child, spouse, unmarried partner or civil partner of a Turkish ECAA worker who has a valid leave to remain in the country.
In the event that you have a child in the UK, you should also apply for permission for them to stay in the UK. This is particularly important if you will be traveling out of the country with them.
To make an application for your child born in the UK, you will need to complete the PBS Dependant application form and submit it with a full UK birth certificate for the child.