mark@mark-Inspiron-3847:~ $ sudo apt-cache policy apt
apt:
  Installed: 1.6.3ubuntu0.1
  Candidate: 1.6.3ubuntu0.1
  Version table:
 *** 1.6.3ubuntu0.1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
        100 /var/lib/dpkg/status
     1.6.1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
mark@mark-Inspiron-3847:~ $