Yes semi skimmed. I did the test 1hr after the first. TBH the first is high given I hadn't eaten or anything
What quantity of milk do you make your tea with? If it's just a dash, it would be odd for that to cause a significant increase, but if you make it as my grandmother did where it was mostly milk, that might affect things.
It's worth testing immediately before drinking your tea,
then 2 hours later. I've seen
@KennyA discuss coffee previously, where it causes an increase in his blood glucose levels, but at 2 hours after he's down to normal levels again. Might be the same for you.
Also, definitely worth considering the dawn phenomenon effect
@MissMuffett mentioned. It can cause unpredictable readings in the morning, anywhere from 4am onwards, up to when you eat usually (even a bit beyond for some people).
Edit - Your profile shows you're on tablets. Do you mind if I ask which ones? Have you been taking them as prescribed?