The GDC is the organisation that regulates dental professionals within the United Kingdom.

All dentists, dental nurses, dental technicians, clinical dental technicians, dental hygienists, dental therapists and orthodontic therapists must be registered with us to work in the UK.

If you require more details the GDC has a website

You can call the customer advice and information team on 
0845 222 4141

Or you can write to
37 Wimpole Street, London, W1G 8DQ