Lets say the Germans have a bit more luck:
1) At Narvik (1) the German guard destroyer guarding the entrance left station without being relieved. Lets say it stayed at station and so the British are unable to launch a surprise attack. The British either attack anyway without surprise or don't attack at all that night, but lets say 6 (out of 10) German destroyers are able to sneak out the next night and make it back to Germany.
2) Light cruiser Karshrue OTL leaving Kristiansand, the commander was criticized for not saving the ship, lets say the Germans make every effort to get the ship back to Kristiansand and is later repaired.
3) Heavy cruiser Blucher attempts to run Drobak sound at a bit higher speed than OTL, heavy damage is caused but one less heavy shell and one less torpedo hits and the ship doesn't sink.
So the Germans save 1 Heavy and 1 Light cruiser and 6 destroyers. The 6 destroyers would be repaired and ready by August 1st, the cruisers by October 1st.
Would the extra German naval forces have any effect on the war going forward????