During the time there was obviously massive emphasis on resistance (home guard/auxiliary units, fortifying of beaches, accelerating attempts to get the US to join the war) but was there any support or plans for surrendering or negotiating with Germany? Rather than continuing to hold out alone.
In the event of a sucessful Nazi invasion, the plan was not for the goverment or monarchy to surender but to make tactical retreats. The goverment planned to move further north whilst the monarchy was to flee to Canada.
It was widely expected that any Nazi invasion would take place on the South coast and a network of defences were built to slow down any invading force, thus allowing time to retreat.
Churchill ordered the creation of the Auxiliary force, a highly secretive guerilla force designed to sabotage any areas the Nazis sucessfully captured. However, with a life expectancy of two weeks, this was not a long term plan to drive the Nazi forces out of Britain but to cause chaos and slow down their advance from behind enemy lines.