If a piece of tooth has broken off, put it in milk or saliva (by spitting into a container if it's your tooth, or having your child spit into a container if it's theirs) and take it to a dentist. The dentist may be able to glue the piece of tooth back on.
Do not go to a GP. They will not be able to give you dental treatment.
For urgent dental treatment:
If you do not have a dentist or cannot get an emergency appointment:
You may have to pay for your appointment.
Treatments for a chipped, broken or cracked tooth may include: