Ok late 80's... but even then the football is far lower than now, and remember club success did not tally with international success.. not by a long shot.. so trying to say the english game was healthier then doesn't really add up...
In fact the mid 70's to mid 80's was our worst period in the history of our international football....
Basically group stages at most, normally didn't qualify, only once did we make the second round in that period..
72,74,76,78 didn't qualify, 80 group stages, 82 second group stage, 84 didn't qualify....
From 98 > now we have been latter stages at most championships... semi's or 1/4s 5 times in the last 16 years pre-2012...