Partly correct 12miles.
That season when we won at Bolton in the old 3rd Div.(72-73). Notts C was the penultimate away game. A win was needed in reality but not mathematically(2 more games remained).Don Hutchings missed a golden chance for us late on.
The other match you mention was at Bristol Rovers for the last match of the season and Swansea had to lose at Preston in season 80-81 in the old 2nd Div.
Hope that clears things up.
I was at all those games by the way - still had to look it though.