Historic medical records

Wibbles

I am trying to obtain my medical records from 30+ years ago - to clear my mind when I had a serious accident.

I have moved house in between - so different GP / Hospital.

Does NHS keep medical records forever or are they destroyed after x years ?

How do I start my search - and where ?

Is there a central storage place or are they held locally (to my old residence)?

I have access to my GP records and they stop in 1995 (my accident was 1990)

I found this site

https://transform.england.nhs.uk/information-governance/guidance/records-management-code/records-management-code-of-practice/

Which seems to imply that MR are kept for 100 years- but I am unsure …..

What is the primary purpose of medical records - for the patient to be able to get updates of their health needs or for the health professionals use ?

Have any of you - successfully obtained historic records ?