| Testing for known mutations in family members | Postnatal Diagnosis Urgent | London Institute of Neurology | 10 | £321 (HSS) |
| Testing for known mutations in family members | Postnatal Diagnosis Routine | London Institute of Neurology | 20 | £221 (HSS) |
| Targeted mutation analysis | Postnatal Diagnosis Urgent | London Institute of Neurology | 10 | £321 (HSS) |
| Targeted mutation analysis | Postnatal Diagnosis Routine | Exeter RGC | 20 | £75 |
| Targeted mutation analysis | Postnatal Diagnosis Routine | London Institute of Neurology | 40 | £221 (HSS) |
