Lost UTR

I am a overseas landlord. now I want to do the self assessment this year. however, I can't find my utr (lots of documents were lost during my relocation). since my a overseas landlord, I can't access the online service. and I tried the hmrc helpline, never got through. pls advise what I should do?

Hi,

You will need to keep trying our overseas number or write to us here:

Self Assessment: general enquiries

Thank you.