Using Royal Mail UNG and UNH codes

Hello
Today is my first day using the Royal Mail codes UNG AND UNH. What i would like to know is when i prepare the post do i still use the green and red ppi labels that attach to the sack with a cable tie ?
If so do i put my account number on the label. Previously i had to put my license info and poster details on. I am currently waiting on hold with Royal Mail to check, thought i may get a quicker response here.
Thanks
Joanna