This evening it was chicken kiev with corn on the cob
Oh dear, no wonder your levels are so high. Do you count your carbs? Have you any idea how many grams you consume in a day? Do you know that all carbs convert to glucose once inside the system and this swims around in our blood stream?
The less carbs we eat, the less glucose is swimming about and the lower our levels will be. Almost everything you ate yesterday was high carb - porridge, skimmed milk, bread, probably the yogurt drink (total carbs will be on the container), breadcrumbs on the chicken, and corn.
It's all a big learning curve, for all of us, but the first lesson is reduce the carbs. Bread, cereal, potatoes, rice, pasta are the main culprits.
What you need to do from today is to test before you eat and again 2 hours after first bite. Look at the rise. Any more than 2 mmol/l and there were too many carbs in that meal. Keep a food diary including portion sizes and record your levels alongside, and look for patterns.
Keep posting and let us know how you go on.