Well I have a confession to make.... I needed the new hive ready for spring to put in my overwintered new Queen Azure, Hive Number 5 or the Flow when it arrives. which will be Numbers 1 & 2 - Not to be confused with NUC's 1 & 2.
On Sunday I took 3 frames of brood from Emerald and 2 from Sapphire and put them into the National Nuc. Today after being locked up for 3 days I did an inspection... I have a viable emergency Queen Cell and a couple of Queen cups also possibly viable.
If the split didn't work I was going to reunite the frames to their original hives. I figure with the nectar and pollen they are pulling in, I have 2 weeks to grow a queen and another 2 to get her laying before closing down for winter.
I will do a hive inspection 20th August - queen should have hatched, mated and started laying by then... Fingers Crossed.
If there are no eggs being laid by 1st September, they will go back to the original hives.
A walk away split can be made without having a queen and just eggs or larvae no older than 3 days old.
I took frames of new brood from both Emerald (3 frames) and Sapphire (2 frames) on Sunday with both capped and uncapped brood, and enough nurse and worker bees to look after the brood and some drone cells on some of Emerald's brace comb.
Drones fly only during favourable weather conditions, when air temperature is higher than 19°C and not more than 38°C generally between 2pm- 4:30pm 
Drones are Viable to mate after 2 weeks old (38 days from egg). Hence the need to put in some drone comb; the drones will be ready to fly when Virgin Azure is ready to mate.
All the frames had pollen, some capped honey, nectar and a top feeder just in case.
Close up the NUC entrance and walked away.
Today I have lots of bees, drones, capped brood and plenty of stores. And best of all a couple of Queen cells and cups.
There should be a new queen in about 2 weeks Sunday (2nd August) a week to 10 days for Azure to mate and I will check the hive 20th August and hopefully we will have a laying mated Queen Azure F3 - her queen cell is on Emeralds frames.