|Chamberlain arrives at Munich, 29 September 1938.|
Here from Wikipedia is a direct quote.
My good friends, this is the second time there has come back from Germany to Downing Street peace with honour. I believe it is peace for our time. We thank you from the bottom of our hearts. Now I recommend you go home, and sleep quietly in your beds.
World War II and its tens of millions of deaths resulted about a year later. Most Britons could not sleep quietly in their beds as German bombs blasted the nation.