Success

I didn't persist with trying to get them to sleep in the cots during the day. It's just not going to work for us.
I've decided just trying to let them sleep where and when they want to is the best option.
Both boys fell asleep on their own under blankets on the floor. I'm going to get a single duvet to put down for them to sleep on which should be a bit more comfy than the floor.

"Nippers for NICU fun day" is slowly taking shape I'm getting so excited. It's going to be a great day hopefully, and busy