Woman who suffers fits and fatigue claims electrical substation 20 yards from her home has given her 'radiation poisoning'
- Margaret Kiernan, 49, suffers fits and fatigue and uses a wheelchair
- Blames mystery illness on poisoning from an electrical substation
- Is complaining to Crawley Borough Council about expansion plans
- But experts claim electric and magnetic fields near electricity substations are 'well below the levels associated with established health effects'