For a Brit a bit of a odd time to go nostalgic. Almost the whole decade was characterized by austerity and rationing during the War and post-War under the Labour government.
Pre-Cliff Richards, Pre-skiffle boys.
The age of Vera Lynn and trad jazz groups.
The 1930s in America weren’t wonderful with Hoover/Roosevelt but there was streamlined design, swing bands (jazz and Texas country), blues, Betty Boop cartoons, and more. Some fixate on that (like Robert Crumb).
It was the last time people in Britain felt that they had a sense of purpose and community solidarity through shared hardship. I think that is what is missed. Compared to that, there is something rather hollow about the materialism, decadence and degeneracy of modern Britain.