There are a lot of comments about this being historically inaccurate- and yes. There are a lot of picky authenticity things they should work on if they make another series of this- period and military details that need work.
Some of the 'PC' additions to history were rather tiresome. OF COURSE, the rich Tory boy is a villain. OF COURSE we have a biracial character. OF COURSE we have a Jewish character. OF COURSE our 'heroes' are all clearly labor or left leaning in their viewpoints. I am not trying to be racist here, but our biracial female character says her black father was in the British Army and left for America because they treated him so badly. Now, if this is 1960, and we will assume she is 19 or 20, that makes her time of conception around 1939... This is before immigrants from the west Indies came in the 50s. I have not (though I could be wrong) heard of any black/west Indian soldiers in the British Army before WWII. I also doubt that her British born father, even if he was black, would go to the US for better treatment than he would receive in the UK. Don't forget- this is before the civil rights movement. But this sort of historical inaccuracy is rampant in TV now. People have forgotten how it really was. Given the racism of the day, would a biracial woman even be working as a server on a military base in 1960?
But all of this aside, I found the show to be entertaining and worthy of a bigger budget and another season. There are characters who were very interesting and I think with the ending, there are many places this show could go.