Salad cream is BAD STUFF!!! It's got 26g of FAT, AND 20g of sugar per 100g. Avoid it like the plague. (Anything that is high fat AND high sugar will send your BG soaring).
TBH - what you ate seems like a pretty bad diet for a diabetic (I'm T2 and my BG would have gone WAY past 12 mmol/L if I ate what you did that day/night!).
You're numbers later in the night are promising, though. Looks to me like if you cut out some/most of those carbs, you'd get control of your diabetes pretty easily.
I love a curry - but I avoid the nan bread, and the rice (and, unfortunately, the chips...). I'll usually have a Curry (Madras/Korma), with a side dish of Sag Paneer (spinach). (If I'm extra peckish, I'll have a Shami Kebab to start, too).
I'd guess that your pancreas is in pretty good shape (from your results above). Getting those numbers down and keeping them down seems entirely do-able. Good luck!