Daylight air superiority denied
Sea Lion's sky condition unmet.
Britain remained in the war as an island base. That is the strategic legacy.
Integrated air defence became a twentieth-century staff subject -- historically, not as a manual here.
Lessons
Integrated air defence shown
Radar plus control rooms.
A civic vocabulary
The Few -- for better and narrower.
Keep the cost as a range
about 500-1,000 RAF aircrew dead in the battle period; Luftwaffe losses higher; civilian Blitz deaths are a linked but wider ledger Battle of Britain is not improved by a fake precise integer.
Memory is national
US/UK/AU/CA rites and the memory of English Channel, southeast England, London approaches will not match. Name the difference when teaching Battle of Britain.
Unresolved
Census still a band
"about 500-1,000 RAF aircrew dead in the battle period; Luftwaffe losses higher; civilian Blitz deaths are a linked but wider ledger" remains a band. New archives refine Battle of Britain; they do not un-happen 10 July-31 October 1940 (official RAF dates).
Archives uneven
Files on Battle of Britain remain unevenly open across English Channel, southeast England, London approaches. Douglas Bader's paper trail is not the same as Hugh Dowding's.
Sea Lion
The invasion sketch that required a sky Germany did not win.
Teaching hours
English classroom hours on Battle of Britain still disagree with hours in English Channel, southeast England, London approaches. Is this a guide to air combat? is often the gap.
Shifts
Channel
Jul 1940: Convoy fights; the learning month.
London
Sep 1940: Daylight capital; then night.
Memory
After: Films, flypasts, Polish plaques.
Afterlife of the name
Battle of Britain left institutions and stories that outlasted 10 July-31 October 1940 (official RAF dates). Hugh Dowding became a caption; English Channel, southeast England, London approaches kept the rubble or the letterhead.
Outlook
Scholarship
New archives will refine Battle of Britain (The Few speech, Blitz eases) without un-happening 10 July-31 October 1940 (official RAF dates).
Memory handover
As witnesses die, museums and film carry Battle of Britain. Hermann Goring and Winston Churchill will keep being recast.
This atlas
Battle of Britain stays a historical file -- a dated campaign, not a live order of battle or a method.
Risk
closed campaign
The 1940 daylight fight is closed. Residual risk is "Few" myth crowding out radar rooms, exile pilots, and the Blitz civilian ledger.
"Finest hour" is a brand that later politicians rent. Check the invoice.
Overlord's island was paid for in 1940, among other bills.