Ended up ditching Neutron and the NTP thing all together.
I made some alterations to allow w32time to be able to set to the correct date/time when the current date/time is way out – then I copied w32tm from another PC onto the terminal and then used the command ‘w32tm /resync /nowait’ in HKLM/bla/bla/Run to kick it off at logon.
I found that if the terminal was booting for the first time, the w32tm command was not reliable. I tweaked it to add a 10 second delay before executing the command. I can only assume it was because the network wasnt ready or something….