There is an worrying article on the BBC website about "Patients with life-long conditions are being fined up to £100 for collecting their free prescriptions" bbc.co.uk/news/health-31537381, effectivelly the law was changed to enforce that it is the holding of the 5 year long exemption certificate that entitles a patient to free prescriptions, not the medical condition alone.
If anyone has an exemption certificate, you should check the end date on it and ensure that you get it re-issued, otherwise you could get hit by this fine.
John