Please can someone advise on a student loan taken out in 1996. can this be classed as statute barred?

I was under the impression that my student loans had previously been written off due to long term ill health for a considerable amount of time and i then never heard from them for deferment.

I have recently got back into work for the last few years and have moved house numerous times.

I have recently just received a letter in the post from Erudio and a solicitors acting for them to collect on a 7k debt for the loan taken out in 1996.

Given that i thought the loans were written off, this has caught me off guard and i am worried about it.

The question is: Does statute barred limitation still apply if i have changed addresses in the 6 year period?

They must have known where i lived, since they have posted this correspondence to me.

if someone could help i would be grateful.

regards