Ubuntu 18.04 Bionic Beaver ntp inactive dead

Having installed ntp services on Ubuntu 18.04, we had to manually start manually on any reboot  using:

               sudo service start ntp

It turns out that in Ubuntu 18.04, systemd has an in-built timesync service that fires on boot called systemd-timesyncd. I believe this service was clashing with ntp and causing ntp to fail to start.

I’ve carried out the following to disable systemd-timesyncd on all three time servers, and to replace it with ntp:

sudo systemctl stop systemd-timesyncd

sudo systemctl disable systemd-timesyncd

sudo systemctl status systemd-timesyncd

sudo systemctl enable ntp

suso systemctl start ntp

sudo systemctl status ntp

All timeservers now appear to start ntp correctly.