I wouldn't normally on a Thursday, but in the (still very cool) garage, I noticed that the Czechish Pilsner polypin in its cardboard cube (is that a cubitainer?) looked a bit distended.
Not good if they're under pressure!
So I had to pour a glass for safety's sake.
Came out very lively, with a head and actual carbing bubbles rising. Not like my beers at all!
No flavour change perceptible, so why the sudden refermentaion? Perhaps that's just 'yet'.
It had gone from SG1050 down to 1010 over 3 weeks and didn't move thereafter.
Then it was racked to cask just over a month ago.
I think I noticed a little bit of livelyness on Friday evening, which is probably why I had a check tonight.
Maybe some of the previous Notty yeast from months ago were loitering in there and even in Campden solution and boiling water rinse-out have revived. Or maybe it is just the MJ M84 Bohemian yeast having their own revival.
Much more testing will be required from tomorrow evening and the weekend.