First experiment carried out at Weedon shows that an aircraft reflected electromagnetic energy and these reflections can be detected and displayed on a cathode ray tube.
Visibility is perfect with Dungeness being visible from Dover.
The Bf 110s of EprGr 210 lead by Swiss born Hptm Rübensdörffer come in at low level to attack the radar network. Lacking azimuth tracking and confusing range information by passing abeam the radar sites, the Filter Room at Fighter Command assigns the plot an 'X' code (doubtful origin).
Oberleutnant Otto Hintze leads 3 Staffel's eight Bf 109E-1/B Jabos - carrying one SC250 bomb each - attacking Dover. They approach the Dover radar at right angles to make them harder to detect but are picked up by the Rye Radar. The towers are slightly damaged and huts are smashed. Hintze reports seeing the towers clearly swaying.
Two minutes later Lieutenant Rössinger leads 2 Staffel's Bf 110s attacking Rye. Almost every building is hit, except the transmitting and receiving block. The Filter Room repeatedly tries to contact them eventually being told by a WAFF that "Your X raid is bombing us."
Hauptman Rübensdörffer leads the attack on Dunkirk. One 500kg bomb moves the concrete transmitter building several inches.
The final element of 1 Staffel's Bf 110s hit Pevensy with eight 500kg bombs, one of which cuts the power line taking the station off line.
A breach of 160 km has been opened in the radar coverage.
Standby generator is now providing the power until the main power cable can be repaired.
Escorted by 120 Bf 110s of III/ZG 76 and 25 Bf 109s of JG 53 as top cover are picked up by Polling radar at noon: a large formation approaching Brighton from due south before crossing the coast they turn west. As they cross in front of Polling and behind Ventor they are tracked by the ROC, splitting as they come to Spithead.
15 specially selected crews (II/KG 51) dive bomb droping 500kg bombs on Ventnor radar station taking it out of action for three days. 15 of the 74 bombs land in the complex.
A second formation of 70(68?) Ju 88s attacks Portsmouth harbour with horizontal and diving bomb runs in the face of 50 barrage balloons and intensive AA fire from guns on shore and ships. The bombers take advantage of the corridor through the barrage balloons at the harbour entrance.
The Hurricanes and Spitfires of 10 Group (152 , 213 & 609 Sqns) scrambled to intercept are vectored in by controllers in small groups and focus on the bombers whilst their escort, circling at 3,000m, wait for a large fighter group to arrive. As more and more bombers are shot down the escort realise that no large formation is going to present itself as a target and engages in the combat.
In the ensuing melee - that involved nearly 300 fighters in total - 13 RAF fighters are shot down and four are damaged, and five Bf 110s and two Bf 109s are lost.
More Bf 109s - the escort for the return leg - are seen heading west but Fighter Command vectors 615 Sqn's Hurricanes between them and the battle over the Isle of Wight.
12(9?) Do 17s were lost including that of the Geschwaderkommodore Oberst Dr Johnan-Volkmar Fisser who lead the attack on Ventnor.
Later German reconnaissance of Ventnor reports craters in the vicinity of the masts and station quarters on fire.