Thankfully I thought to put them in a tub, so it's sort of a self correcting problem, they now have enough headroom! It's noon the next day now and they're just sedately bubbling away, I'll change the lids, give them a wash and it'll be fine. This picture shows the amount of headroom I left, the two in the plastic were fine with that, hardly any foam at all. They were pitched the same day with the Philly Sour, the other two have Nottingham, totally different reaction. You can see how much headroom there actually was now that the foam has subsided, perhaps it was slightly less but not by much. The last batches in those jars were fine with that amount, I think the Nottingham just really took off because I put a teaspoon of DAP and a teaspoon of wine nutrient in when I pitched it. Still, I'll leave a bit more room next time!
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