I remember it well, my younger brother was/is a huge footie fan, and we sat in the living room and watched it on the TV. I was old enough to have left school and be at work (unlike all you young things) and a couple of weeks later, I made sure I was in the queue in the Post Office to buy a couple of the rationed England Winners postage stamps. They'd issued a series of 3 stamps to mark our hosting of the world cup that year, then overprinted the 4d one with the words "England Winners". Have a look here
http://www.stamp-shop...england-winners.html. I've still got them somewhere...
(If a shilling converted into a 5p in 1971, and there were 12 pennies in a shilling, that means that in 1966 it cost about 1.5p to post a letter !)