Just reporting back...
So i changed the D.00 to initially 12kw and then tested both UFH only and CH and it was still going into Anti cycling mode, with the UFH it did it more frequently then it did with CH.
Then i changed the setting to 8kw and same result and this morning i dropped it even further to 6kw and also dropping the Flow to 55C to see if this would have any impact. but still It went into anti cycle and the Flow would hot 65 before the change and then 60 so basically overshooting by 5c.
So today the UFH has been on longer due to kitchen being much cooler (also the -2/3 outside) than my living room, so what i noticed was at 6kw and 55C flow, the boiler would get to about 60c and then hit the anti cycle mode and then go down to about 40c, then it would stop complete when it got to 40c with the time only flashing (pump is not running at this 1-2 min period) and then will sit on this screen for about 1-2 min before firing again and going and heating to the desired flow temp.
I also noticed the return temp were above the desired 54c (needed for the boiler to be most efficient) regardless of the flow temp being at 55c, 60c or 65c.
I have come to a conclusion after reading various forums over the last 24 hours where there are may others on the same boat as me....THAT this is the best im going to get due to limitation in the setup i have, i believe the only way i can solve this is to have a buffer tank installed (as suggested by many others on various threads on the internet). But sadly i just dont have the space as i live in a terrace house with not much space to put one.
i assume with this usage the boiler wont be as efficient as one would like it to be but i dont see any other way...
@Shaun - i am still to find out the return temps on the loops, do you have suggestion on which clip thermometer i can buy? I have the attached Infra red guns but im not sure how accurate the readings are because when i did try it was giving much lower readings e.g. the incoming temp from boiler was 60C and when i pointed at the copper pipe just below the manifold as a test it would show 31c/ and then the flow pipes would on the manifold was showing 27c.
So i may get the clip ones you suggest - any recommendation?