I am also interested in what this means. My middle son aged 6 has been identified by his school as gifted in maths - maths aged of 10 year old. but now he is year 2 and there seems to be no resource / extra work or acknowledgement that he needs extra attention. As a result of this I am about to change his school to send him privately as smaller classes and more attention will be best for him. He also has extra classes outside of school which gives him more structured and difficult work.
I cant see any advantage to the scheme.
I had the same problem with my youngest son, acknowledgement of his gift, but no further work offered to keep him occupied. Consequently, he got very bored with school and would stop listening. Unfortunately NAGTY was not available at primary level, but not sure it would have been the answer anyway. Children need help closer to home, not by some organisation based miles away that runs courses all over the country, if you're willing to travel.