Multiple independent mainstream news outlets in the supplied evidence report that Prince Harry and Meghan Markle flew privately to — and landed in — the United Kingdom on 2026-08-26 with their two children, and that the family planned an extended stay (children enrolled to start school in September). No source in the provided material reports the family leaving the UK before 2026-08-31. Taken together, the contemporaneous arrival reports and the stated extended-stay plans establish that Harry, Meghan, Archie and Lilibet were physically present in the UK during the UK calendar date 2026-08-31.