thankyou Paul, I can indeed adjust 1061 and 1062 so it must be the latest firmware. Apart from the water pump cycling the most useful improvement for me is the modulation of LWT. I can see it is working right now preventing an overshoot of target room temperature which would otherwise cause unnecessary cycling that many complain about.
It means that the setting of the weather compensation is not so critical and the controller can adapt to solar heat gain/wind chill effects and set backs like I described in my other post. Finally understanding Samsung smart controller algorithms for the triple dip tariff set back operation