Some advice please

From previous diary results you seem to consistently have some carbs at about 23:30, so the option to move to that time is available........

That 3 am test you have given is a useful bit of information, it tells you that your BI is too strong or that your QA is too much, that's why carb free is best when BI testing...........

You could have went lower than that 5.6 and then rebounded to give you the 14.7, or you could have remained within 1/2 mmols of the 5.4 then the DP could have kicked in, again, confirming this with the 3am, 4am, 5am tests would be good also.......

Allegedly 3 am is a time where there is the least hormonal activity, and its the hormones we need try and fight on a daily basis, as opposed to just meeting carbs with insulin.....

When taking your BI at dinner time in the past, was it successful? You say you have had high mornings for the past 17 years.............that must be really tiring.........

Moving your dose to later on would increase the chances of beating the highs ie. more insulin at 3, 4, 5am inside you......increasing the dose would also help, and that's were a 3 am is important, eventually you will increase the dose to a point were it is too much, 3 am test is the only way to know when this happens......

When I was on the Isophane I took that at dinnertime, teatime to us scots and always high. Then when on the lantus took that at the same time and my bs was on target all the time. A vast improvement.

I was having 0 carbs at bedtime for months and then the DAFNE HCP told me that was probably why I was going high as my body was crying out for glucose and the brain was telling the liver to produce some glucose.

The concept of your liver releasing energy more severely through lack of carbs is valid and one which I experience on a daily basis........but surely your liver would not release extra stores of glucose during the night when you are sleeping, it wouldn't need to, as your energy need are lower at night.........

So for the purpose of testing an overnight BI dose you could still go carb free, to see what is happening up until the point the DP kicks in.........and if you observe a greater rise when not having anything you can go back to having carbs once you know the dose is right, as it will also help beat the morning highs......