I have applied for Invalidity Pension having worked in the public sector for 20 years. I have been granted early retirement on ill-health grounds. I am currently on Illness Benefit. Soon I will have to undergo a medical assessment for Invalidity Pension. I would love to hear from anybody who has been through this process or knows anything about it. My disability is very severe chronic pain due to Acquired brain injury but not visible so the assessors can only take my word about the extent of my suffering.