3rd September
heavy air attacks on fighter commands southern airfields continue. While the targeted airfields are damaged, the damage is not serious enough to put them out of action, and the Luftwaffe continues to miss many of the dispersal fields used by the squadrons. Losses of RAF fighters are heavy, but the Luftwaffe losses are even worse, and it starting to look as if they will be unable to achieve any sort of air superiority during September, especially as the carcasses of downed Luftwaffe aircraft are now a common sight in the south east of England. More worrying to the RAF is the steady losses of fighter pilots
This worry seems to be felt in Germany as well; Hitler postpones the invasion of Britain, scheduled for 15 September, to 21 September, but issues Operational orders covering it.
The German navy continues to build up its forces of light craft and barges in the Channel ports. These are now the subject of regular night bombing by the RAF's light bombers; the individual attacks are not terribly effective, but the combined total is steadily reducing the number of barges available.
In the Far East, The Japanese army and navy agree on a southern advance strategy. The army needed considerable time to prepare itself for the Southward Advance even after mobilization was approved formally. When the admirals procrastinated, Tanaka Shin'ichi, head of the Army General Staff's Operations Division, scathingly asked if the navy was up to its old game of using the name of war preparations to secure additional allocations of funds and materials. But he also agreed to a simultaneous attack on Malaya and the Philippines using ten, not six, divisions. This concession got the navy off the hook and, by September 3, it agreed to join the army in pressing for a definitive peace-or-war decision by early October at the latest, as the generals had desired.
In an unrelated move, the US government warns the Japanese government against making aggressive moves in Indochina. The Japanese government is unimpressed.
7th September
An unexpected change in Luftwaffe tactics is immediately obvious as over 300 bombers escorted by as many fighters raid London Docks. The attack causes huge fires, which spread during the evening to cause serious damage to the dock area. Opinion is divided as to whether this change is the final prelude to an invasion, or a last gasp by a failing attacker. There is no sign of any of the barges moving, and sigint and Bletchly Park report nothing unusual; there is some cautious optimism that the Luftwaffe has shot its bolt.
Over the next few days, the pattern of a number of small attacks and one large one on the London area is repeated. Belief in Britain is now that either the invasion will occur within the week, or it will be called off. Bomber commands has now destroyed over 15% of the massed barges, and nightly raids continue. The fleet has been put on alert and all boiler-cleaning stopped; the heavy Home Fleet units are at 2 hours notice for steam at Scapa. The Royal navy continues to saturate the channel with small craft.
In order not to make them feel forgotten, the FAA squadrons based in East Anglia mount a dawn strike on two German destroyers in Calais; one is sunk by dive bombing, and the Cormorants strafe barges as they head back home just above the sea. The French channel ports are now so well lit up at night by burning barges that the RAF is referring to them as the 'Blackpool front'.
On the 10th September what is later seen as the final daylight effort of the Luftwaffe is made. Two massive and heavily escorted raids are made, in what is seen as an attempt to find if 11 Group remains in being. Reinforced over the last few days by fresh pilots and squadrons from 10 and 12 Groups, it most certainly is, over 80 German aircraft being shot down for the loss of 30 fighters. This will be the last large daytime offensive for the Luftwaffe; rather than defeating RAF fighter command is steady, high losses have instead gutted the German bomber and fighter force. Small daylight raids will continue, but shortly the heavy attacks will resume at night where the British defences are at the moment less effective.