...and what does that make in percentages? And how many were sunk by subs? And the Tonnage?
Anyway, the operation included lucky strikes on both sides. Warspite went ape on German Destroyers, while the biggest battlewagons in German service were lucky enough to catch an aircraft carrier with only 2 DD's as an escort, singing all 3. However, after that, both battlewagons had to go to port because of the damage inflicted on them.
Warspite's achivement was quite some. She and her destroyer escorts trapped 8 German destroyers and eliminated them all. I think without loss but I am not sure. One german Sub was thrown in as a bonus, Sunk by Warspite's Swordfish bipe.
Anyway, since this was a big chunk of the New Kriegsmarine (NB, much of the RN ships were WWI vintage), they basically could not face the RN in any numbers after that, but rely on hit & run instead, and run meaning...RUN. This is before Dunquerque. So, the Kriegsmarine was not that bad a threat during the channel retreat (that is the bigger ones, the E-boats were a pest), the LW was the one. Targets of dream, ships at anchor loading troops from small boats, and/or even docked ships.
Oh, by the way, the evacuation at Dunquerque took place while there was still fightin in and around Norway.
Getting to the point of the beginning of the BoB, it means that the Germans do not have enough strenght to carry on naval ops in daylight, nor enough strength in the air to make a proper umbrella. It was down to trying to tug troops at night, which is of course as short as possible in mid-june. They did have their paratroopers (although the driving person behind the application of the Paras was off, - severly wounded at the time). With paras they would probably have been able to seize some parts of England at night, but being totally cut off from a supply line they's be facing the fate of a "Bridge too far"....