Yes, it's amazing how locally different our weather can be. Could it be something to do with your location being closer to the coast than mine?.
Don't see how that affects high cloud! But yes, the coast does have an effect - especially with a showery airstream off the sea, which is often near continuous rain here. Last night clear from 9:00 pm (BST) till 03:30 am, early high cloud slid away S or SE then completely clear with good transparency until high cloud (? could have been thin stratus) spread in from the West. Wind was calm early, then a land breeze sprang up, the temperature was cool but not cold (around 5C most of the night, min 3.9C). Patchy fog first thing this morning, now dissipated, sky 100% thin altostratus.
