@Revington
You could try signing on for class A Jobseekers credits.
You can be in both the class S and class A systems at the same time.
Then if you take up employment, you can restart your Jobseekers credits after each period of employment ends.
This will ensure that you get 52 reckonable contributions each year. (a mix of paid and Jobseekers credits)
You are allowed a maximum of 1040 credits.
You are probably entitled to carers credits.
Only up to 520 of your maximum credits can be Jobseekers credits, so you need to be mindful that you could run out of useful Jobseekers credits.
Another method of preventing your Class S contributions from converting to non Reckonable contributions is to have some earned self employment each year.
This could be any small amount.
For instance you could do a small job for a friend or family member in return for payment. Then submit this as earned self employment in your tax return.