Dad brings in the grub

I wasn't going to post any more pictures of the great tits until the eggs started to hatch, but today I noticed that Dad GT had been bringing in large winged insects rather than caterpillars. The first picture is Dad looking at the eggs while Mum is out; in the second, he sits on them for a bit. In the other two, you can see Mum snuggled right down into the bowl of the nest with feathers fluffed and head tucked in. It would be interesting to know what the insects are, but I'll just have to wonder, I think.