Perhaps firstly
@nedboyd1967, could you provide a little more information such as :
what type of diet you follow and what have you been eating for your evening meal and supper?
What types and dose of insulin are you having from morning to night?
What were your BSLs like in the evening, night and early morning before this latest trend started?
Have there been any changes to your lifestyle such as more or less exercise, increased stress, a recent illness, a change in diet?
A change in your insulin type, injection sites, injection technique or doing more injecting of insulin in the same area or switch from multiple daily injections to an insulin pump??
How well protected is your insulin from temperature extremes such as over 30 degrees C, freezing.
This 'list' might be helpful in future but for now: information is power for the detective in us all!!!