Could not resolve 'mirror.oxfordnanoportal.com'

[b-brankovics]

Hi, During my last apt update I have received the following error:

Err:1 http://mirror.oxfordnanoportal.com/apt bionic-stable InRelease
  Could not resolve 'mirror.oxfordnanoportal.com' 
Reading package lists... Done
W: Failed to fetch http://mirror.oxfordnanoportal.com/apt/dists/bionic-stable/InRelease  Could not resolve 'mirror.oxfordnanoportal.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.

Did the url change in the meantime?