OK, MickeyD's times are right. I just got the stage 2 alert from Gridwatch.
Condolences ... S1 would have clobbered me at 16:00 during office hours, I prefer the 20:00 S2 slot (hell, they might even call it off by thenS2 sees me off at 4pm, so I made 100% sure of the times!![]()