Starts at 6B, and goes to 6A, 5B, 5A, etc.
Grades 6 and 5 are timescale, while Grade 4 to 1 is superscale.

Timescale salaries are currently.. behind the private sector a bit coz the private sector salaries jumped a bit faster in the past two years. But it will probably be reviewed and increased soon.

Superscale salary is well... basically what you would expect.