Your topics vary widely, instead of specific databases, I suggest liking of type of materials you need, then using our specialized databases
Language has changed over last century, and it is often difficult to determine which words would have been used 50+ years ago.
Britain is a different country, their language is different, innit? Be careful with word selection when picking keywords.
Most primary source databases will have "thematic" filters to get you started. Before keyword searching, start there. See what curated documents come up. From those documents, see what terminology is being used by contemporaries.
Begin with basic searches and do not be too complicated. DO NOT USE TOO MANY TERMS AT ONCE
Be sure to use period-specific language.
Do NOT search a bunch of terms. This will give more, not less, false its.