Well, things have moved on. There are now five moths out of the cocoons and there are two pairings! The first pairing doesn't seem to have produced much in the way of eggs, but at least there is another chance with the second.

I hope the oak decides to get a move on - the leaves are still just buds at the moment and I would be grateful not to have any offspring from this pairing having to spend their egg days in the fridge!