it seems to be contradicting itself, suggesting if you cannot produce the required paperwork you just need to undertake a covid test on arrival, paragraph 5.
it's actually quite clear in my photo, I was granted till the 17th but I left on the 18th, there is no time stamp so it must all relate to calender days.
Thank you Tod,,, until this trip I had never ever put much thought into my length of stay in relation to the visa for some reason, food for thought for the future, thanks again.