I now have both water and heating coming on for 1/2 hours morning and evening just to keep it ticking over. Even though the system is OFF with boiler definitely shut down, the pump still runs. It is not running water around the CH system but just circulating it around the local HW tank pipework but not via the boiler.
It is a Sentinel Housing property and the heating system was installed/upgraded a couple of years ago to bring it up to current standards and legislation.
So is this the modern way, with the pump continually running.