As the plants have started to flower it became obvious that three of the 11 cm pots contained nothing more than Utricularia bisquamata which is a little naughty as they were supposed to be different species and were commercially obtained. They'd spread through the sphagnum so that couldn't be used again so I've lumped them all in a 10" (25 cm) round, deep saucer which will be kept flooded and sit outside well away from the rest of the Utricularia. The three aquatic pots are already refilled and now I have two Genlisea included in the trial.
Not a great deal of flowering in the trays this season. The plants have spread nicely and they also have far bigger leaves than I'd ever seen on them before which may show promise for next season. The Sphagnum moss really appreciated the conditions and I've had to trim it back. A standard gravel tray of Sphagnum tips was a nice bonus. The air pump has now been removed and stored until spring, the freezing temperatures will damage the diaphragm.
This spring I discovered that the diaphragm perished over winter as the pump was running but no air output. Today I've taken all the contents out of the net pots and just made three large areas (Double trays) for the Utricularia to inhabit. They're lumped in in the same trays as previously so as they are free to roam the fittest will now survive. Personally I think the eventual winner will be Drosera capensis. I may add a root of U reniformis to one of the trays just for fun.