yes the debt was ongoing before i met my partner and the debt was running for over 10 years now but she didnt pay until the 9th year and no acknowledgement in writing only a family member talked it over the phone with them on her behalf as she is no good at sorting out problems etc.would a email to them be sufficient saying statue barred or must it be in letter format

Hi i am writing on behalf of my partner,so around 10 years ago she went overdrawn with Lloyds and as you know the debt was sold onto Lowell,since then she got another good standing Lloyds account with planned overdraft,personal loan,interest free credit card. Her credit score on clearscore.com is 400/700 and on the timeline on her credit report on clearscore the old Lloyds debt or Lowell dont show up,so she been having letters for years until 3 years ago they sent her a threat pre legal letter and she started paying £10 off the £434 remaining now £373,since stopped paying it 2 years ago they send letters all the time saying they will knock the amount down owed if you pay. last week she had a pre legal assessment letter and now today post came with another letter saying 'Your Lloyds account remains unpaid,we are now deciding whethere to transfer your account to a solicitor to take legal action against you to recover this debt. so what should she do advice please as i dont want her stressed as shes pregnant and she worries.