I dont know how but I just check gravity for the first time on these and I am sitting at about 1.014 on one and 1.016 on the other and they are still going. Based on my OG of 1.071 I am at about 79% and 77% attenuation with this yeast. they are still bubbling the blow off jar about once every 5 to 10 seconds too.
Wyeast page says about 75% max??? I always lose a good amount of temp during my mash (went from 155.8 to start down to 150.6 at the end of mash) so that just made the wort a littel more fermentable but thats still over the 75% that wyeast claims.
Anyone know if this is usual for London Ale III 1318 ???