... picks up ladle

In terms of stamp collection jargon ... not so much ... British Empire for the early years?, British Commonwealth later years? Sometimes it's just British followed by the geographical area .. British Oceania, British Asia, etc.
I am not a much of a specialist, but I am partial to that mid-century window when former colonies became free and self governing ... Post Colonial? ... nah ... they wrote "Independence" on their stamps and we wrote new names on album pages. One could just stop there .. but should one?
There are many words for the history of colonization. and it is worth reading up on ...