the ICI shells could be from the 30’s to the late 60’s but are most likely the later. The Eley-Kynoch 12 from the 70’s to recently (not sure when the switch from paper to plastic took place [late 80’s to mid 90’s? with some lines still being paper] but plastic is also known headstamped like that) & the Westley’s is from the late 1980’s early 90’s- I think that’s when those appeared.
The Western I think from the 40’s to the 70’s (probably 1950’s for that one) & no idea about the German other than a wild guess being 1930’s to the 70’s & it looks like a brass washed steel head.
All these dates are from the top of my head, so should be taken with a grain or two of salt