Originally Posted by maztec
For what it is worth, the overall average temperature was 66F.
Well, the average temp doesn't matter. What matters is the actual fermentation temperature, unfortunately. Keep in mind that fermentation is "cleaner" at the bottom of the yeast strain's optimal fermentation temperature, even if you're in the yeast manufacturer's safe zone. That yeast is known for its estery profile, and is a good choice for English beers as a result. It's not really known to be a "clean" yeast, even if you're in the temperature range recommended by the manufacturer. If you want a "clean" yeast, you'd want S05.