There would have been virtually no resistance.
The well documented German plans were for EVERY able bodied Englishman between the ages of 17 - 45 to be taken to Europe as slave labour.
Edward VIII would have been installed as king with David Lloyd George as a puppet PM. They would have appealed for national unity under German command and would largely have got it.
I think thats what we did with all the german POWs, around 25% of all agricultural work after that war was done by them. Was slavery really