The AA-defense of Oscarsborg fires at them but with no noticeable result. There is still a lot of oil burning on the water, and the German soldiers understands that there will be armed resistance. The weather is cloudy, but in the morning the clouds begins to break up over Fornebu. Further out on Oslofjord the cloud cover is heavier. At five o'clock two Gladiators starts on air patrol.
More patrols follows, but no more enemy aircrafts are intercepted.
Possible arrival time to Oslo is calculated, and it is decided to send up the Gladiators in good time to be able to intercept in case Oslo is the target. They flies south toward Dr bak, and patrols in that area. It is the German Me110 Staffel with the mission to assist the paratroop assault on Fornebu. Lt Tradin orders break of formation and independent selection of targets. A long air combat begins as more and more German aircrafts turns up.