Ok guys i've done it! Hurray!
In short my tactic based on the good tips here.
1) I started moving my units on round 3. The first two rounds i weakend battleships, cruiser and destroyer. I left most of them at 1-3 strenght, so they cant sink my transports.
2.) I used airborne units to draw the AI fighters attention to them. This is most important on round 1 since it soaks up much damage.
With this tactic i could save 90% of my units. The destroyed I replaced with fighters.
The scenario is even on Colonel ultra hard. Its nearly impossible to achive decisive victory. Especially if you move your units from Round 3.
I needed 14 rounds to achive victory.
Here are some screenshots as proof:
http://www.bilder-space.de/show_img.php ... e=original
This is the full map. As you can see i have full units.
http://www.bilder-space.de/show_img.php ... e=original
Here a close look at London and the endfight. I still used one Panzer 1B. Look at the left city.
http://www.bilder-space.de/show_img.php ... e=original
Reward is over 12000. Makes total over 16000 prestige, since i never use elite replacement and i hadnt used up all i had at Sea Lion.
Thanks again for the good strategics!
