I don’t know what the appeal is for a moth to sit in a plant pot or plant tray during daylight hours, but they seem to be popular! Thankfully it was better light than the previous occasion, so I could get a nice clear photo.
It’s possible that this is the same moth (or at least one of the same type) as we found in the plant pot, but with the clearer photos, I can at least try and identify this one. Looking at several different moth ID sites, I’m pretty sure this is a Large Yellow Underwing.
They are truly nocturnal moths, so that might explain why it wanted to shelter in a plant tray during the day. Apparently both the Yellow and the Red Underwing moths flash their brightly coloured underwings when disturbed, to try and surprise any birds that might attack them. This particular moth seemed happy to just sit and pose for a while, but when it did fly off it moved so quickly we had no chance of seeing what colour the wings were!